Selected size effects in magnetic nanocrystalline systems and thin layers

Size: px
Start display at page:

Download "Selected size effects in magnetic nanocrystalline systems and thin layers"

Transcription

1 Selected size effects in magnetic nanocrystalline systems and thin layers Habilitation Thesis Tadeusz Szumiata Laboratory of Magnetic Materials Department of Physics Faculty of Mechanics Technical University of Radom Krasickiego 54, Radom, Poland

2 My great thanks to Dr. hab. Katarzyna Brzózka, Prof. Wiesław Wasilewski, M.Sc. Michał Gawroński, M.Sc. ing. Bogumił Górka and Dr. Kazimierz Hibner my colleagues from Department of Physics at Technical University of Radom for help, common hard work in Mössbauer Laboratory, kindness and longtime friendship, to Prof. Pavol Sovák, Prof. Peter Kollár and all my collaborators from Faculty of Science in P.J. Ńafarik University in Końice - for great friendliness and cooperation on magnetic nanocrystalline alloys, to Prof. Mike Gibbs, Dr. Nicola Morley, Dr. Athar Javed and all my friends from Department of Materials Science and Engineering in University of Sheffield (U.K.) for very effective cooperation and help in the field of magnetic thin films as well as unusual hospitality during my scholarship staying in Sheffield, to Dr. Ryszard Żuberek and Prof. Anna Ślawska-Waniewska from Institute of Physics of Polish Academy of Sciences in Warsaw for fruitful collaboration on magnetostriction of nanocrystalline alloys and for longtime friendship, to Prof. Tadeusz Kulik - Vice-Rector for Scientific Research of Warsaw University of Technology for great kindness and help in fabrication and structural characterisation of nanocrystalline magnetic materials, to M.Sc. Józef Balcerski from Solid State Physics Department in Faculty of Physics and Applied Computer Science in University of Łódź for thin films fabrication, to my Family for great tolerance and patience. 2

3 The habilitation is based on12 articles [1] T. Szumiata, M. Gawroński, B. Górka, K. Brzózka, J. S. Blázquez-Gámez, T. Kulik, R. Żuberek, A. Ślawska-Waniewska, "Hyperfine fields and magnetoelastic surface effects in Fe 72 Cu 1.5 Nb 4 Si 13.5 B 9 nanocrystalline alloy", Nukleonika 48 Suppl. 1 (2003) pp. S85-S88. [2] T. Szumiata, K. Brzózka, M. Gawroński, B. Górka, J. S. Blázquez-Gámez, T. Kulik, R. Żuberek, A. Ślawska-Waniewska, "Mössbauer and magnetoelastic investigations of the surface effects in Fe 72 Cu 1.5 Nb 4 Si 13.5 B 9 nanocrystalline alloy", Journal of Magnetism and Magnetic Materials (2004) pp [3] K. Brzózka, T. Szumiata, M. Gawroński, B. Górka, P. Kollár, P. Petrovič, "Mössbauer spectroscopy temperature investigations of Fe-Si-Cu-Nb-B powder", Czechoslovak Journal of Physics 54 Suppl. D (2004) pp. D193-D196. [4] T. Szumiata, B. Górka, A. Zorkovská, P. Sovák, "Structure and hyperfine interactions in Al-doped FINEMET", Journal of Magnetism and Magnetic Materials 288 (2005) pp / 295 (2005) pp [5] A. Javed, T. Szumiata, N.A. Morley, M.R.J. Gibbs, "An investigation of the effect of structural order on magnetostriction and magnetic behavior of Fe-Ga alloy thin films", Acta Materialia 58 (2010) pp IMPACT FACTOR:

4 [6] T. Szumiata, K. Brzózka, M. Gawroński, B. Górka, A. Javed, N. A. Morley, M. R. J. Gibbs, "Structural and magnetic ordering in Fe-Ga thin films examined by Mössbauer spectrometry", Acta Physica Polonica A 119 (2011) pp [7] K. Brzózka, T. Szumiata, P.Sovák, B.Górka, K.Hibner, J. Balcerski, "Finemet thin films substituted by chromium CEMS and MOKE study", Acta Physica Polonica A 118 (2010) pp [8] T. Szumiata, M. Gzik-Szumiata, K. Brzózka, "Modelling of thermomagnetic curves obtained with Mössbauer spectromery for two-phase nanocrystalline alloys", Materials Science - Poland 25 (2007) pp [9] T. Szumiata, M. Gzik-Szumiata, K. Brzózka, M. Gawroński, B. Górka, "Modeling of magnetic hyperfine field distribution for spherical nanoparticles of bcc structure", Acta Physica Polonica A 113 (2008) pp [10] T. Szumiata, M. Gzik-Szumiata, K. Brzózka, "Pseudodipolar model of surface magneto-striction for thin layers with roughness", Materials Science - Poland 26 (2008) [11] T. Szumiata, M. Gzik-Szumiata, K. Brzózka, "Electrical resistivity dependence on surface roughness geometry in thin films", Acta Physicae Superficierum 11 (2009) pp [12] T. Szumiata, M. Gzik-Szumiata, "Model of anisotropic electrical resistivity in rough thin films", Acta Physica Polonica A, 118 (2010) pp

5 Criteria (P. J. Šafárik University in Košice) Required Fulfilled 1. Educational activity: - Period [years of employment] Handbooks and scripts Publications: - In total From Current Content data base Citations: - In total (excluding autocitations) WoS and SCOPUS citations Grants and scientific projects 2 4 5

6 Outline Motivation General thesis and questions Experimental research on nanocrystalline alloys Experimental research on thin layers Theoretical models General conclusions 6

7 Motivation Inspired by Feynman: There is Plenty of Room at the Bottom Richard Feynman, December 29th 1959, annual meeting of the American Physical Society at the California Institute of Technology (Caltech) Two-phase nanocrystalline alloys [e.g. FINEMET of Fe 73.5 Nb 3 Cu 1 Si 13.5 B 9 composition originally proposed by Yoshisawa (1988) and NANOPERM Fe(Zr,Nb)B(Cu,Y,Mo)] are known for very high effective permeability, high saturation magnetization, small magnetostriction and coercivity. Thou nanocrystalline materials have already found wide applications (e.g. as excellent lossless transformer cores, in microwaves inductors) the physics of them is not entirely understood. Some questions are still open especially connected with size effects resulting from the presence of nanograins and their surface. The interface region between grains and amorphous matrix is very difficult to evidence with X-ray diffraction. Mössbauer spectroscopy seems to be a very helpful technique for this purpose. Thin films of magnetostrictive materials with low saturation field (H s ), low coercivity (H c ) and significant saturation magnetostriction constant ( s ) have applications in magnetic microelectromechanical systems (MagMEMS) and possibly in spintronics. Low-cost Fe-Ga alloys (Galfenols) are of interest due to their superior magnetic and mechanical properties over other magnetostrictive materials (e.g. Terfenol-D and shape memory alloys). On the other hand, magnetically soft thin films of FINEMET substituted by Cr seem to be very important for applicational point of view e.g. they can be used for fabrication of magnetic thin film inductors in high-frequency technique. Present work is focused mainly on thickness dependent effects (structural variations, internal stress evolution, spin texture and magnetic anisotropy of the films). 7

8 General theses and questions 1. Is it possible to evidence with Mössbauer measurements grains interface (surface) contribution in the case of nanocrystalline alloys possessing nanocrystallites of more complex structure (like in FINEMET) than in the NANOPERM? What is a thickness of the interface region? 2. What kind of size effects are the result of milling process of amorphous FINEMET ribbons studied by means of Mössbauer spectroscopy? 3. Thermomagnetic curves peculiarities of nanocrystalline grains especially slope drop beyond a Curie point of amorphous matrix (observed effectively with Mössbauer spectroscopy) may be regarded as universal feature for nanocrystalline alloys. 4. Fe-Ga alloys in 2D form of thin layers possibly have greater magnetostriction than in the case of bulk due to reduction of DO 3 and L1 2 structural ordering and may be a good candidates for Mag-MEMS applications. Mössbauer (CEMS) experiments may detect some structural and magnetic size effects (e.g. thickness-dependent spine texture, magnetic anisotropy and internal stress) in Fe-Ga thin films. 8

9 5. Thin films of chromium-doped FINEMET are expected to be the objects revealing complex magnetic anisotropy due to the influence of the substrate and internal stress. Magnetooptical (MOKE) experiments combined with Mössbauer (CEMS) measurements may be very helpful in detecting these phenomena, typical for 2D thin layered systems. 6. Superferromagnetic intergrain interactions are presumably crucial for proper theoretical modelling of nanocrystalline grains thermomagnetic behaviour in the vicinity of Curie point of amorphous matrix in two-phase nanocrystalline alloys. Phenomenological description in the case of these complex systems possibly demands an effective exchange integral for nanocrystallites depending on mean spin value of the amorphous phase. 7. Is it possible to predict theoretically a form and temperature dependence of hyperfine field distribution of spherical nanoparticles and nanocrystallites basing on hyperfine parameters values for thin films surface known from Mössbauer (CEMS) experiments? 8. The surface roughness should be a very important factor influencing the effective magnetostriction of thin films. Both electronic and dipolar contribution to surface magnetostriction should be affected by roughness. 9. What kind of size effects in the electrical conductivity of thin monolayers are caused by surface roughness? Is it possible to predict CIP CPP (current-in-the-plain currentperpendicular-to-the-plain) anisotropy just by static averaging of mean free path over the whole structure of rough film? 9

10 Experimental research on nanocrystalline alloys Surface effects in nanograins [1] 10

11 [2] 11

12 Fe-Si nanograins in FINEMET - complicated multisextet Mössbauer spectrum Ranges of HFD for grains and matrix are everlaped at room temperature These two factors make difficult to find traces of the interface phase. Idea: to elevate temperatures (but T < T C am ) Result: HFD --> low HFD(am) + high HFD(if) Mössbauer measurements carried out at elevated temperature confirmed a presence of structural interface effects Estimated thickness of interface: h i 0.5 nm (i.e. about two atomic layers). Additional confirmation - Magnetostriction 12

13 Effective magnetostriction constant Surface term 13

14 Experimental research on nanocrystalline alloys Size effects in powdered aloys [3] 14

15 Ball-milling of as-quenched (amorphouse) FINEMET ribbons In one material - - two interesting magnetic features connected with size effects of the grains: Long milling: significant dispersion of grains sizes Superparamagnetism (for several nm grains) -nonmagnetic doublet even at liquid nitrogen temperatures (blocking temperature is lower) After milling: partial nanocrystallisation of amorphouse FINEMET ribbons powder Superferromagnetism (for larger grains containing many nanocrystallites) superferromagnetic interactions between nanocrystallites via amorphouse matrix are weakened due to finite sizes of powder grains (in comparison with alloys of the form of bulk ribbons) magnetism of nanocrystallites drops beyond Curie temperature of 15 amorphouse matrix

16 Experimental research on nanocrystalline alloys Thermomagnetic curves peculiarities [4] 16

17 17

18 Size effect: superferromagnetism of nanocrystallites in two phase magnetic material 18

19 Constant thickness Various Ga content Experimental research on Fe-Ga thin layers Structural ordering and magnetostriction [5] 19

20 Magnetostriction optimization (no DO 3 nor L1 2 structure!!!) Mössbauer results will be presented in details for another series of samples. 20

21 Various thickness Constant Ga content Experimental research on Fe-Ga thin layers Structural and magnetic size effects [6] 21

22 CEMS - Spectra CEMS - HFD No DO 3 nor L1 2 structure!!! Domination of BCC disordered A2 phase. DO 3 (Fe 3 Ga) L1 2 (Fe 3 Ga) 22

23 Size effects: Nonmonotonic dependence of lattice constant on film thickness anomaly for Nonmonotonic dependence of hyperfine parameters on film thickness t = 40 nm [ Interpretation internal stress evolution during growth process] Spin texture reveals a transition from the in-plane to out-of-the-plane configuration with increasing thickness (monotonic dependence of angle) [ Interpretation perpendicular magnetocrystalline anisotropy rise (in relation to dipolar one )] 23

24 [7] 24

25 Y X

26 26

27 [8] 27

28 28

29 [9] 29

30 30

31 [10] 31

32 32

33 Pseudodipolar model electronic contribution (exchange interactions, magnetocrystalline anisotropy) Dipolar magnetic interactions 33

34 [11] 34

35 35

36 [12] 36

37 Present results concerning thickness dependence of CIP resistivity for smooth films are very close to those in former work [4] obtained by static averaging of isotropic MFP. However in the case of rough surfaces the present model predicts higher CIP resistivity by about 20% for t/l 0 = 0.5 and by about 40% for t/l 0 = It could be explained by the fact that new model based on dynamic simulation considers in the natural way a trapping of electrons by surface roughness. 37

38 General Conclusions 1. Mössbauer measurements at elevated temperatures confirm a presence of structural interface effects in FINEMET-type Fe 72 Cu 1.5 Nb 4 Si 13.5 B 9 nanocrystalline alloy that was additionally supported by magnetostrictive investigations. Both a thickness of the interface region and surface magnetostriction constant have been estimated. Size effects in nanocrystalline materials seems to be important not only for alloys of simple structured grains (e.g. NANOPERM) but they are universal feature for this kind of materials. Mössbauer spectrometry not only sees the interface region (HREM would be better) but points to the significant changes in physical properties of the inteface (via hyperfine parameters). 2. FINEMET powder studies by means of Mössbauer spectroscopy show that milling process is responsible for several kinds of size effects in magnetic of nanocrystalline alloys e.g. nanocrystallisation, superparamagnetism, weakened superferromagnetism and grain boundaries influence. 3. The peculiarities of thermomagnetic curves of nanocrystalline grains (slope drop) beyond a Curie point of amorphous matrix are universal feature for nanocrystalline alloys. It has been proved with Mössbauer spectroscopy that addition of Al to FINEMET alloy does not change the character of thermomagnetic behaviour (thou it reduces Curie temperatures). 4. Two-dimensional character of growth process of Fe-Ga thin films (with co-sputtering and evaporation technique) effectively reduces a tendency to DO 3 and L1 2 structural ordering, what has been clearly confirmed in XRD and CEMS experiments. This result foster a fabrication of high-magnetostrictive films based on Fe-Ga alloy for Mag-MEMS applications. Other interesting size effects observed in the investigated films are: thickness evolution of spin texture, perpendicular magnetocrystalline anisotropy, internal stress as well as possible influence of surface roughness on effective magnetostriction constant. 38

39 5. Chromium-doped FINEMET thin films reveal several 2D-type magnetic features, like in-plain magnetization alignment and in-plain magnetic anisotropy (i.e. angular dependence of the coercivity) evidenced by magnetooptical (MOKE) and Mössbauer (CEMS) measurements. Since FINEMET(Cr) layers are distinguished by relatively small coercivity, they are good candidates for base material for new generation microwaves inductors. 6. Proposed theoretical model of thermomagnetic behaviour of nanocrystalline grains beyond a Curie point of amorphous matrix in two-phase nanocrystalline alloys fits well experimental data from Mössbauer spectrometry. Surface effects and weakenning of superferromagnetic intergrain interactions has been simulated with effective exchange integral for one phase depending on mean spin value of the other phase. 7. Model, based on MFA calculations and utilizing hyperfine parameters of thin magnetic layers surface, predicts a hyperfine field distribution of spherical nanoparticles (or nanocrystallites) surface at given temperature however realistic simulation of all possible atomic environments and lattice distortions at spherical surface would be a very complex task. 8. Theoretical considerations convince that electronic contribution to the surface magnetostriction of bcc Fe monocrystalline films increases with increasing surface roughness and prove that magnetic dipolar contribution is also not negligible. 9. Developed theory of electrical transport in thin monolayers effectively predicts several size effects, like rapid increase of electrical resistivity for very thin films (compared to mean free path) and its CIP CPP anisotropy caused by rough surface. In order to reproduce this anisotropy, dynamic simulations are necessary considering electrons trapping by roughness. 39

40 Answers to the questions of Oponents 40

41 Prof. 41

42 NO YES BOTH 42

43 Volumetric fraction of grains determined from the Mössbauer spectra should be a sum of grain core contribution and surface-interface contribution. When spectra are too complex it is extremely difficult to subtract surface-interface contribution from amorphous matrix contribution. It is a source of uncertainties. 43

44 The information in the text possesses only a technical (not scientific) meaning. It has been just underlined, that genetic algorithm was utilized, what prevent wandering around local minimum of 2 function. 44

45 Prof. 45

46 Mössbauer spectra are too complex No possibility of high temperature CEMS EM nor AFM pictures not available yet (grain size) Question of grain interface and surface interface 46

47 Y X

48 Present model: effective exchange integral Future: individual spins of 2D model 48

49 49

50 Direct techniques Indirect techniques question of elastic <-- constants of the substrate 50

STRUCTURE AND MAGNETIC PROPERTIES OF CoFeB ALLOYS PREPARED BY BALL MILLING

STRUCTURE AND MAGNETIC PROPERTIES OF CoFeB ALLOYS PREPARED BY BALL MILLING STRUCTURE AND MAGNETIC PROPERTIES OF CoFeB ALLOYS PREPARED BY BALL MILLING * Jozef BEDNARČÍK, ** Jozef KOVÁČ, ** Viktor KAVEČANSKÝ, * Peter KOLLÁR, *** Krzysztof POLANSKI, **** Jana KVASNICOVÁ * Department

More information

STRUCTURE AND MAGNETIC PROPERTIES OF CoFeB ALLOYS PREPARED BY BALL MILLING

STRUCTURE AND MAGNETIC PROPERTIES OF CoFeB ALLOYS PREPARED BY BALL MILLING STRUCTURE AND MAGNETIC PROPERTIES OF CoFeB ALLOYS PREPARED BY BALL MILLING * Jozef BEDNARÍK, ** Jozef KOVÁ, ** Viktor KAVEANSKÝ, * Peter KOLLÁR, *** Krzysztof POLANSKI, **** Jana KVASNICOVÁ * Department

More information

Magnetic properties of ball-milled FeAl nanograins

Magnetic properties of ball-milled FeAl nanograins phys. stat. sol. (a) 21, No. 15, 3333 3337 (24) / DOI 1.12/pssa.245498 Magnetic properties of ball-milled FeAl nanograins L. F. Kiss *, 1, D. Kaptás 1, J. Balogh 1, L. Bujdosó 1, J. Gubicza 2, T. Kemény

More information

COERCIVITY OF THE FIELD-ANNEALED NANOCRYSTALLINE FeCoNbB ALLOYS

COERCIVITY OF THE FIELD-ANNEALED NANOCRYSTALLINE FeCoNbB ALLOYS TOME VI (year 28), FASCICULE 3, (ISSN 1584 2673) COERCIVITY OF THE FIELD-ANNEALED NANOCRYSTALLINE FeCoNbB ALLOYS Tibor KRENICKY, Stanislav FABIAN Technical University of Košice, Faculty of Manufacturing

More information

Structure and magnetic properties of nanocrystalline soft ferromagnets

Structure and magnetic properties of nanocrystalline soft ferromagnets Hyperfine Interactions 130: 181 219, 2000. 2000 Kluwer Academic Publishers. Printed in the Netherlands. Structure and magnetic properties of nanocrystalline soft ferromagnets T. Kemény a,d.kaptás a,l.f.kiss

More information

MAGNETIC ANISOTROPY OF UFe 10-xNixSi2 INTERMETALLIC ALLOYS

MAGNETIC ANISOTROPY OF UFe 10-xNixSi2 INTERMETALLIC ALLOYS Vol. 98 (2000) ACTA PHYSICA POLONICA A No. 5 Proceedings of the International Conference "Condensed Matter Physics", Jaszowiec 2000 MAGNETIC ANISOTROPY OF UFe 10-xNixSi2 INTERMETALLIC ALLOYS Z. DRZAZGA

More information

Microstructure and magnetic properties of nanocrystalline Fe-based alloys

Microstructure and magnetic properties of nanocrystalline Fe-based alloys Materials Science-Poland, Vol. 26, No. 1, 2008 Microstructure and magnetic properties of nanocrystalline Fe-based alloys M. HASIAK 1*, M. MIGLIERINI 2, J. KALETA 1, J. ZBROSZCZYK 3, H. FUKUNAGA 4 1 Institute

More information

MICROMAGNETISM AND THE MICROSTRUCTURE OF FERROMAGNETIC SOLIDS

MICROMAGNETISM AND THE MICROSTRUCTURE OF FERROMAGNETIC SOLIDS MICROMAGNETISM AND THE MICROSTRUCTURE OF FERROMAGNETIC SOLIDS HELMUT KRONMULLER MANFRED FÄHNLE Max-Planck-lnstitut fiir Metallforschung, Stuttgart, Germany CAMBRIDGE UNIVERSITY PRESS Acknowledgements page

More information

Ferromagnetic transition in Ge 1 x Mn x Te semiconductor layers

Ferromagnetic transition in Ge 1 x Mn x Te semiconductor layers Materials Science-Poland, Vol. 25, No. 2, 2007 Ferromagnetic transition in Ge 1 x Mn x Te semiconductor layers W. KNOFF *, P. DZIAWA, V. OSINNIY, B. TALIASHVILI, V. DOMUCHOWSKI, E. ŁUSAKOWSKA, K. ŚWIĄTEK,

More information

STRUCTURE AND MAGNETIC PROPERTIES OF THE Zr 30

STRUCTURE AND MAGNETIC PROPERTIES OF THE Zr 30 Structure Rev.Adv.Mater.Sci. and magnetic 18(2008) properties 379-383 of the Zr 30 379 STRUCTURE AND MAGNETIC PROPERTIES OF THE Zr 30 ALLOY FORMED BY MECHANICAL ALLOYING A. Grabias 1, D. Oleszak 2 and

More information

Citation for published version (APA): Borsa, D. M. (2004). Nitride-based insulating and magnetic thin films and multilayers s.n.

Citation for published version (APA): Borsa, D. M. (2004). Nitride-based insulating and magnetic thin films and multilayers s.n. University of Groningen Nitride-based insulating and magnetic thin films and multilayers Borsa, Dana Maria IMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if you wish

More information

Recent Development of Soft Magnetic Materials. K. I. ARAI õ and K. ISHIYAMA õ ABSTRACT

Recent Development of Soft Magnetic Materials. K. I. ARAI õ and K. ISHIYAMA õ ABSTRACT Int. J. of The Soc. of Mat. Eng. for Resources Vol. 4 No. 1 89 `95 (1996) Review Recent Development of Soft Magnetic Materials by K. I. ARAI õ and K. ISHIYAMA õ ABSTRACT Three large topics for recent soft

More information

Ab-initio Calculation of Structural and Magnetic Properties of Annealed Cu 2 MnAl Heusler Alloy

Ab-initio Calculation of Structural and Magnetic Properties of Annealed Cu 2 MnAl Heusler Alloy International Conference on Material Science and Application (ICMSA 2015) Ab-initio Calculation of Structural and Magnetic Properties of Annealed Cu 2 MnAl Heusler Alloy Hang SHI 1,a, Xin WANG 2,b*, Nan

More information

Soft Magnetic Nanocrystalline Alloys for High Temperature Applications

Soft Magnetic Nanocrystalline Alloys for High Temperature Applications Materials Transactions, Vol. 43, No. 8 (2002) pp. 2000 to 2005 Special Issue on Bulk Amorphous, Nano-Crystalline and Nano-Quasicrystalline Alloys IV c 2002 The Japan Institute of Metals Soft Magnetic Nanocrystalline

More information

Soft Magnetic Nanocrystalline Alloys for High Temperature Applications. 1. U.S. Naval Research Laboratory, Materials Physics Branch, Code 6340,

Soft Magnetic Nanocrystalline Alloys for High Temperature Applications. 1. U.S. Naval Research Laboratory, Materials Physics Branch, Code 6340, Soft Magnetic Nanocrystalline Alloys for High Temperature Applications Matthew A. Willard 1, Frank Johnson 2, John H. Claassen 1, Rhonda M. Stroud 1, Michael E. McHenry 2, and Vincent G. Harris 1 1. U.S.

More information

NOVEMBER 10. FINEMET is a registered trademark of Hitachi Metals, Ltd.

NOVEMBER 10. FINEMET is a registered trademark of Hitachi Metals, Ltd. NOVEMBER 10 FINEMET is a registered trademark of Hitachi Metals, Ltd. http://www.hitachi-metals.co.jp/e/prod/prod02/prod02.html As IT and electronic devices become small and improve its performance, issues

More information

Chapter 8 Nanoscale Magnetism

Chapter 8 Nanoscale Magnetism Chapter 8 Nanoscale Magnetism 8.1 Characteristic length scales 8.2 Thin films 8.3 Thin film heterostructures 8.4 Wires and needles 8.5 Superparamagnetism 8.6 Bulk nanostructures TCD March 2007 1 One nanoscale

More information

Magnetic interactions in NdFeB bulk permanent magnets with additions

Magnetic interactions in NdFeB bulk permanent magnets with additions JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS Vol. 8, No. 5, October 2006, p. 1765-1769 Magnetic interactions in NdFeB bulk permanent magnets with additions H. CHIRIAC, N. LUPU *, C. CHIRIAC a, M.

More information

Soft Magnetic Properties of Nanocystalline Fe Si B Nb Cu Rod Alloys Obtained by Crystallization of Cast Amorphous Phase

Soft Magnetic Properties of Nanocystalline Fe Si B Nb Cu Rod Alloys Obtained by Crystallization of Cast Amorphous Phase Materials Transactions, Vol. 43, No. 9 (2002) pp. 2337 to 2341 c 2002 The Japan Institute of Metals EXPRESS REGULAR ARTICLE Soft Magnetic Properties of Nanocystalline Fe Si B Nb Cu Rod Alloys Obtained

More information

SOFT MAGNETIC NANOCRYSTALLINE ALLOYS

SOFT MAGNETIC NANOCRYSTALLINE ALLOYS Journal of Optoelectronics and Advanced Materials Vol. 5, No. 1, March 2003, p. 133-138 INVITED PAPER SOFT MAGNETIC NANOCRYSTALLINE ALLOYS J. M. Grenèche * Laboratoire de Physique de l Etat Condensé, UMR

More information

PRECIS AND CONCLUSIONS

PRECIS AND CONCLUSIONS CHAPTER VIII PRECIS AND CONCLUSIONS 8.1 SUMMARY Present study was undertaken to establish a new mechano-chemical method using auto combustion for preparing nanoparticle Mn-Zn materials by using metal oxides

More information

DEVELOPMENT OF NANOCRYSTALLINE MATERIALS FOR SOFT-MAGNETIC APPLICATIONS

DEVELOPMENT OF NANOCRYSTALLINE MATERIALS FOR SOFT-MAGNETIC APPLICATIONS Trans. Indian Inst. Met. Vol.58, No. 6, December 2005, pp.981-991 TP 2016 DEVELOPMENT OF NANOCRYSTALLINE MATERIALS FOR SOFT-MAGNETIC APPLICATIONS Amitava Mitra and Ashis Kr. Panda Magnetism Group, National

More information

Magnetic and Structural Properties of Fe Mn Al Alloys Produced by Mechanical Alloying

Magnetic and Structural Properties of Fe Mn Al Alloys Produced by Mechanical Alloying Hyperfine Interactions 148/149: 295 305, 2003. 2003 Kluwer Academic Publishers. Printed in the Netherlands. 295 Magnetic and Structural Properties of Fe Mn Al Alloys Produced by Mechanical Alloying G.

More information

3d metallic layers electrochemically deposited from nearly nonaqueous electrolyte *

3d metallic layers electrochemically deposited from nearly nonaqueous electrolyte * Materials Science-Poland, Vol. 26, No. 3, 2008 3d metallic layers electrochemically deposited from nearly nonaqueous electrolyte * W. OLSZEWSKI 1**, K. SZYMAŃSKI 1, M. BIERNACKA 1, R. SOBIECKI 2 1 Faculty

More information

Microstructure and Magnetic Properties of Iron Oxide Nanoparticles Prepared by Wet Chemical Method

Microstructure and Magnetic Properties of Iron Oxide Nanoparticles Prepared by Wet Chemical Method Vol. 114 (2008) ACTA PHYSICA POLONICA A No. 6 Proceedings of the Polish Mössbauer Community Meeting 2008 Microstructure and Magnetic Properties of Iron Oxide Nanoparticles Prepared by Wet Chemical Method

More information

High Anisotropy L1 0 FePt Media for Perpendicular Magnetic Recording Applications

High Anisotropy L1 0 FePt Media for Perpendicular Magnetic Recording Applications DISKCON 2008 High Anisotropy L1 0 FePt Media for Perpendicular Magnetic Recording Applications Boon Chow LIM Agency for Science Technology & Research (A*STAR) DATA STORAGE INSTITUTE 5 Engineering Drive

More information

THE INFLUENCE OF HEAT TREATMENT REGIME ON THE MICROSTRUCTURE AND MAGNETIC PROPERTIES OF MELT-SPUN Nd-Fe-B WITH Nd LOW CONTENT

THE INFLUENCE OF HEAT TREATMENT REGIME ON THE MICROSTRUCTURE AND MAGNETIC PROPERTIES OF MELT-SPUN Nd-Fe-B WITH Nd LOW CONTENT THE INFLUENCE OF HEAT TREATMENT REGIME ON THE MICROSTRUCTURE AND MAGNETIC PROPERTIES OF MELT-SPUN Nd-Fe-B WITH Nd LOW CONTENT N. TALIJAN 1, J. STAJIĆ-TROŠIĆ 1, A. GRUJIĆ 1, V. ĆOSOVIĆ 1, D. NEDELJKOVIĆ

More information

Magnetic properties of (Eu,Gd)Te semiconductor layers

Magnetic properties of (Eu,Gd)Te semiconductor layers Magnetic properties of (Eu,Gd)Te semiconductor layers Dziawa, P.; Osinniy, V.; Dobrowolski, W.; Dybko, K.; Lusakowska, E.; Taliashvili, B.; Story, T.; Smits, C.J.P.; Swagten, H.J.M. Published in: Materials

More information

Magnetic Properties of Electrodeposited Nanocrystalline Ni-Fe alloys

Magnetic Properties of Electrodeposited Nanocrystalline Ni-Fe alloys Magnetic Properties of Electrodeposited Nanocrystalline Ni-Fe alloys Minghe Wang Supervisor: Dr. Marek Niewczas 701 Graduate Seminar 18 th September, 2012 Origin of the magnetism Only atoms with partially

More information

On the Tailoring of Magnetic Properties of Fe-Based Alloy Thin Films by Swift Heavy Ion Irradiation and Thermal Annealing

On the Tailoring of Magnetic Properties of Fe-Based Alloy Thin Films by Swift Heavy Ion Irradiation and Thermal Annealing On the Tailoring of Magnetic Properties of Fe-Based Alloy Thin Films by Swift Heavy Ion Irradiation and Thermal Annealing The development of new materials has been the hall mark of human civilization.

More information

ON THE HALL EFFECT AND MAGNETORESISTANCE OF Co Fe 4.5 Si B 15 Mo 2 AMORPHOUS AND CRYSTALLIZED RIBBONS

ON THE HALL EFFECT AND MAGNETORESISTANCE OF Co Fe 4.5 Si B 15 Mo 2 AMORPHOUS AND CRYSTALLIZED RIBBONS Journal of Optoelectronics and Advanced Materials Vol. 2, No. 5, 2, p. 671-675 Section 7: Non-crystalline materials ON THE HALL EFFECT AND MAGNETORESISTANCE OF Co 66.25 Fe 4.5 Si 12.25 B 15 Mo 2 AMORPHOUS

More information

11 Magnetic Properties of Nanocrystalline Materials

11 Magnetic Properties of Nanocrystalline Materials 11 Magnetic Properties of Nanocrystalline Materials Akihisa Inoue 1, Akihiro Makino 1 and Teruo Bitoh 2 1 Advanced Research Center of Metallic Glasses, Institute for Materials Research, Tohoku University,

More information

Characterisation of Fe-Ni amorphous thin films for possible magnetostrictive sensor applications

Characterisation of Fe-Ni amorphous thin films for possible magnetostrictive sensor applications Characterisation of Fe-Ni amorphous thin films for possible magnetostrictive sensor applications Contents 9.1 Introduction 9.2 Experiment 9.3 Results and Discussions 9.4 Conclusion 9.1 Introduction Magnetostrictive

More information

National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310

National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310 Crystallization Behavior, Nanostructure and Magnetic Properties of Melt-spun (Nd,Pr,Dy) 2 (Fe,Co,Mo) 14 B/α-Fe Nanocomposite Magnets B. Z. Cui 1, 2 *, K. Han 1, Y. Zhang 3, J. P. Liu 2, H. Garmestani 1,

More information

Ultrathin Metal Films

Ultrathin Metal Films Matthias Wuttig Xiangdong Liu Ultrathin Metal Films Magnetic and Structural Properties With 234 Figures 4u Springer Contents 1 Introduction 1 References 4 2 Growth of Ultrathin Metal Films 5 2.1 Growth

More information

Hybrid magnetic/semiconductor spintronic materials and devices

Hybrid magnetic/semiconductor spintronic materials and devices Journal of Magnetism and Magnetic Materials 00 (2006) 000--000 Hybrid magnetic/semiconductor spintronic materials and devices Y.B. Xu, E. Ahmad, J. S. Claydon, Y.X. Lu, S. S. A. Hassan, I. G. Will and

More information

MAGNETIC STUDIES OF POLYCRYSTALLINE MAGNETOSTRICTIVE CoPd FILMS WITH LARGE PLANAR STRAIN*

MAGNETIC STUDIES OF POLYCRYSTALLINE MAGNETOSTRICTIVE CoPd FILMS WITH LARGE PLANAR STRAIN* Vol. 85 (1994) ACTA PHYSICA POLONICA A No. 5 MAGNETIC STUDIES OF POLYCRYSTALLINE MAGNETOSTRICTIVE CoPd FILMS WITH LARGE PLANAR STRAIN* J.JDUBOWIK AND B. SZYMAŃSKI Institute of Molecular Physics, Polish

More information

Session 1A4a AC Transport, Impedance Spectra, Magnetoimpedance

Session 1A4a AC Transport, Impedance Spectra, Magnetoimpedance Session 1A4a AC Transport, Impedance Spectra, Magnetoimpedance Magneto-impedance of [Co 40Fe 40B 20/Cu] Multilayer Films S. U. Jen, T. Y. Chou, C. K. Lo,.................................................................

More information

The structure and magnetoelastic properties of the Fe-based amorphous alloy with Hf addition

The structure and magnetoelastic properties of the Fe-based amorphous alloy with Hf addition AMME 2002 11th The structure and magnetoelastic properties of the Fe-based amorphous alloy with Hf addition S. Lesz a, R. Szewczyk b, D. Szewieczek a, A. Biekowski b a Institute of Engineering Materials

More information

Permeability Measurements on Amorphous and Annealed Samples of Fe 73.5-x Cr x Cu 1 Nb 3 Si 13.5 B 9 Alloys

Permeability Measurements on Amorphous and Annealed Samples of Fe 73.5-x Cr x Cu 1 Nb 3 Si 13.5 B 9 Alloys International Journal of Advanced Materials Science ISSN 2231-1211 Volume 3, Number 2 (212), pp. 63-7 Research India Publications http://www.ripublication.com/ijams.htm Permeability Measurements on Amorphous

More information

Magnetic behaviour of nano-particles of Ni 0.5 Co 0.5 Fe 2 O 4 prepared using two different routes

Magnetic behaviour of nano-particles of Ni 0.5 Co 0.5 Fe 2 O 4 prepared using two different routes Indian Journal of Pure & Applied Physics Vol. 42, May 24, pp 366-37 Magnetic behaviour of nano-particles of Ni. Co. Fe 2 O 4 prepared using two different routes Subhash Chander, Bipin K Srivastava & Anjali

More information

Ruthenium Oxide Films Prepared by Reactive Biased Target Sputtering

Ruthenium Oxide Films Prepared by Reactive Biased Target Sputtering Ruthenium Oxide Films Prepared by Reactive Biased Target Sputtering Hengda Zhang Anthony Githinji 1. Background RuO2 in both crystalline and amorphous forms is of crucial importance for theoretical as

More information

ISSN: ISO 9001:2008 Certified International Journal of Engineering and Innovative Technology (IJEIT) Volume 3, Issue 7, January 2014

ISSN: ISO 9001:2008 Certified International Journal of Engineering and Innovative Technology (IJEIT) Volume 3, Issue 7, January 2014 Annealing Temperature Affecting the Nanocrystalline Alloys Physical Properties V. Tsepelev 1, V. Zelenin 2, V. Belozerov 2, Yu. Starodubtsev 2, and V. Konashkov 1 1 Boris Yeltzin Ural Federal University,

More information

CEMS study on diluted magneto titanium oxide films prepared by pulsed laser deposition

CEMS study on diluted magneto titanium oxide films prepared by pulsed laser deposition Hyperfine Interact (2006) 168:1065 1071 DOI 10.1007/s10751-006-9406-2 CEMS study on diluted magneto titanium oxide films prepared by pulsed laser deposition K. Nomura & K. Inaba & S. Iio & T. Hitosugi

More information

SOFT NANOCRYSTALLINE MAGNETIC POWDERS OBTAINED BY MECHANICAL ALLOYING AND ANNEALING

SOFT NANOCRYSTALLINE MAGNETIC POWDERS OBTAINED BY MECHANICAL ALLOYING AND ANNEALING SOFT NANOCRYSTALLINE MAGNETIC POWDERS OBTAINED BY MECHANICAL ALLOYING AND ANNEALING Viorel Pop Babeş-Bolyai University, Faculty of Physics, Cluj-Napoca, Romania Ionel Chicinaş Materials Science and Technology

More information

New 3-D Bulk Shaped Polycrystalline and Nanocomposite Magnetostrictive Materials*

New 3-D Bulk Shaped Polycrystalline and Nanocomposite Magnetostrictive Materials* New 3-D Bulk Shaped Polycrystalline and Nanocomposite Magnetostrictive Materials* N. Lupu #, H. Chiriac G. Ababei, M. Grigoras M. Valeanu T. Buruiana, V. Harabagiu I. Mihalca National Institute of R&D

More information

Conversion electron M6ssbauer spectroscopic study of YIG substituted with Bi, Ti, Ga and La

Conversion electron M6ssbauer spectroscopic study of YIG substituted with Bi, Ti, Ga and La Hyperfine Interactions 84(1994)421-426 421 Conversion electron M6ssbauer spectroscopic study of YIG substituted with Bi, Ti, Ga and La K. Nomura a, T. Hanai a, R. Sadamoto a, Y. Ujihira b, T. Ryuo c and

More information

Growth and Doping of SiC-Thin Films on Low-Stress, Amorphous Si 3 N 4 /Si Substrates for Robust Microelectromechanical Systems Applications

Growth and Doping of SiC-Thin Films on Low-Stress, Amorphous Si 3 N 4 /Si Substrates for Robust Microelectromechanical Systems Applications Journal of ELECTRONIC MATERIALS, Vol. 31, No. 5, 2002 Special Issue Paper Growth and Doping of SiC-Thin Films on Low-Stress, Amorphous Si 3 N 4 /Si Substrates for Robust Microelectromechanical Systems

More information

Mössbauer Study on Fe Ag and Fe Ni Ag Super-Laminates Prepared by Repeated Rolling and Treated by Gas Nitriding

Mössbauer Study on Fe Ag and Fe Ni Ag Super-Laminates Prepared by Repeated Rolling and Treated by Gas Nitriding Hyperfine Interactions 148/149: 307 316, 2003. 2003 Kluwer Academic Publishers. Printed in the Netherlands. 307 Mössbauer Study on Fe Ag and Fe Ni Ag Super-Laminates Prepared by Repeated Rolling and Treated

More information

Comparison of Magnetic and Mössbauer Results Obtained for Palaeozoic Rocks of Hornsund, Southern Spitsbergen, Arctic

Comparison of Magnetic and Mössbauer Results Obtained for Palaeozoic Rocks of Hornsund, Southern Spitsbergen, Arctic Vol. 114 (2008) ACTA PHYSICA POLONICA A No. 6 Proceedings of the Polish Mössbauer Community Meeting 2008 Comparison of Magnetic and Mössbauer Results Obtained for Palaeozoic Rocks of Hornsund, Southern

More information

FePd (216 Å) grown on (001) MgO. 2θ(deg)

FePd (216 Å) grown on (001) MgO. 2θ(deg) Major Findings 1. FePd thin films The structural characterization of the films grown at various substrate temperatures (RT- 700 o C) was performed ex-situ using X-Ray Diffraction (XRD). The optimum substrate

More information

Calculated Effect of Alloy Additions on the Saturation Magnetization of Fe 0.80 B 0.20

Calculated Effect of Alloy Additions on the Saturation Magnetization of Fe 0.80 B 0.20 Mat. Res. Soc. Symp. Proc. Vol. 754 2003 Materials Research Society CC6.12.1 Calculated Effect of Alloy Additions on the Saturation Magnetization of Fe 0.80 B 0.20 D. M. C. Nicholson 1,YangWang 2, and

More information

Magnetic properties of cementite (Fe 3 C) nanoparticle agglomerates in a carbon matrix

Magnetic properties of cementite (Fe 3 C) nanoparticle agglomerates in a carbon matrix Materials Science-Poland, Vol. 25, No. 2, 2007 Magnetic properties of cementite (Fe 3 C) nanoparticle agglomerates in a carbon matrix K. LIPERT 1*, J. KAŹMIERCZAK 1, I. PEŁECH 2, U. NARKIEWICZ 2, A. ŚLAWSKA-WANIEWSKA

More information

European Synchrotron Radiation Facility, 6 rue Jules Horowitz, Grenoble, 38043, France b

European Synchrotron Radiation Facility, 6 rue Jules Horowitz, Grenoble, 38043, France b M. P. Ruffoni a, S. Pascarelli a, R. F. Pettifer b, R. Grössinger c, R. Sato-Turtelli c, O. Mathon a, A. Trapananti a, G. Aquilanti a, S. Ostanin b, J. B. Staunton b, M. Pasquale d, N. Dempsey e, C. Ndao

More information

PEER REVIEW FILE. Reviewers' Comments: Reviewer #1 (Remarks to the Author):

PEER REVIEW FILE. Reviewers' Comments: Reviewer #1 (Remarks to the Author): PEER REVIEW FILE Reviewers' Comments: Reviewer #1 (Remarks to the Author): The experimental results presented in the manuscript and the supplementary material is very convincing as they are based on in-situ

More information

Magnetic and thermal Mössbauer effect scans: a new approach

Magnetic and thermal Mössbauer effect scans: a new approach Hyperfine Interact (2006) 167:839 844 DOI 10.1007/s10751-006-9369-3 Magnetic and thermal Mössbauer effect scans: a new approach G. A. Pasquevich & P. Mendoza Zélis & F. H. Sánchez & M. B. Fernández van

More information

Research Article Amorphization, Crystallization, and Magnetic Properties of Melt-Spun SmCo 7 x (Cr 3 C 2 ) x Alloys

Research Article Amorphization, Crystallization, and Magnetic Properties of Melt-Spun SmCo 7 x (Cr 3 C 2 ) x Alloys Metallurgy Volume 2, Article ID 9268, 5 pages doi:.55/2/9268 Research Article Amorphization, Crystallization, and Magnetic Properties of Melt-Spun SmCo 7 x (Cr 3 C 2 ) x Alloys Liya Li, 2 and Wei Xie 2

More information

Structural and magnetic characterization of Nd-based Nd-Fe and Nd-Fe-Co-Al metastable alloys D I S S E R T A T I O N

Structural and magnetic characterization of Nd-based Nd-Fe and Nd-Fe-Co-Al metastable alloys D I S S E R T A T I O N Structural and magnetic characterization of Nd-based Nd-Fe and Nd-Fe-Co-Al metastable alloys D I S S E R T A T I O N for the partial fulfillment of the requirements for the academic degree of Doctor rerum

More information

INTEGRATED OPTICAL ISOLATOR

INTEGRATED OPTICAL ISOLATOR INTEGRATED OPTICAL ISOLATOR Presented by Gokhan Ozgur Advisor: Dr. Gary Evans July 02, 2004 Electrical Engineering - SMU INTRODUCTION They are used to eliminate light that is back-reflected, from splices

More information

Magnetic Properties of EuS SrS Semiconductor Multilayer Structures

Magnetic Properties of EuS SrS Semiconductor Multilayer Structures Vol. 112 (2007) ACTA PHYSICA POLONICA A No. 2 Proceedings of the XXXVI International School of Semiconducting Compounds, Jaszowiec 2007 Magnetic Properties of EuS SrS Semiconductor Multilayer Structures

More information

IMAGING OF MICROSTRUCTURAL FEATURES AND LOCAL STIFFNESS OF Α- AND Β-PHASES IN THE TITANIUM ALLOY TI- 6AL-4V BY ATOMIC FORCE ACOUSTIC MICROSCOPY

IMAGING OF MICROSTRUCTURAL FEATURES AND LOCAL STIFFNESS OF Α- AND Β-PHASES IN THE TITANIUM ALLOY TI- 6AL-4V BY ATOMIC FORCE ACOUSTIC MICROSCOPY IMAGING OF MICROSTRUCTURAL FEATURES AND LOCAL STIFFNESS OF Α- AND Β-PHASES IN THE TITANIUM ALLOY TI- 6AL-4V BY ATOMIC FORCE ACOUSTIC MICROSCOPY Jonas O. RABE, Ute RABE, Sigrun HIRSEKORN Fraunhofer Institute

More information

MAGNETO-CALORIC AND MAGNETO-RESISTANCE EFFECTS IN HEUSLER TYPE FERROMAGNETIC SHAPE MEMORY ALLOYS

MAGNETO-CALORIC AND MAGNETO-RESISTANCE EFFECTS IN HEUSLER TYPE FERROMAGNETIC SHAPE MEMORY ALLOYS Scientific report over the period December 214- December 21 Project PN-II-ID-PCE-212-4-16. Nr. /213. Project title: MAGNETO-CALORIC AND MAGNETO-RESISTANCE EFFECTS IN HEUSLER TYPE FERROMAGNETIC SHAPE MEMORY

More information

Study of Magnetic Materials by Mössbauer Thermal Scans. Application to Nanocrystalline Systems

Study of Magnetic Materials by Mössbauer Thermal Scans. Application to Nanocrystalline Systems Journal of Metastable and Nanocrystalline Materials Vol. 22 (2004) pp. 39-44 online at http://www.scientific.net Citation 2004 Trans & Tech Publications, Switzerland Copyright (to be inserted by the publisher

More information

NANO-SCALE MAGNETISM

NANO-SCALE MAGNETISM NANO-SCALE MAGNETISM M.R.J.GIBBS SHEFFIELD CENTRE FOR ADVANCED MAGNETIC MATERIALS & DEVICES DEPARTMENT OF PHYSICS & ASTRONOMY UNIVERSITY OF SHEFFIELD SHEFFIELD S3 7RH UK TEL. +44 114 22 24261 FAX: +44

More information

6.8 Magnetic in-plane anisotropy of epitaxially grown Fe-films on vicinal Ag(001) and Au(001) with different miscut orientations

6.8 Magnetic in-plane anisotropy of epitaxially grown Fe-films on vicinal Ag(001) and Au(001) with different miscut orientations C. Epitaxial Growth 6.8 Magnetic in-plane anisotropy of epitaxially grown Fe-films on vicinal Ag(001) and Au(001) with different miscut orientations M. Rickart, A.R. Frank, J. Jorzick, Ch. Krämer, S.O.

More information

Fabrication and characterisation of amorphous and nanocrystalline Fe-Ni thin films

Fabrication and characterisation of amorphous and nanocrystalline Fe-Ni thin films Chapter 4 Fabrication and characterisation of amorphous and nanocrystalline Fe-Ni thin films Contents 4.1 Introduction 4.2 Experiment 4.3 Results and Discussions 4.4 Conclusion 4.1. Introduction Nanocrystalline

More information

Structure and magnetic properties of Fe 36 Co 36 B 19 Si 5 Nb 4 bulk metallic glasses

Structure and magnetic properties of Fe 36 Co 36 B 19 Si 5 Nb 4 bulk metallic glasses of Achievements in Materials and Manufacturing Engineering VOLUME 30 ISSUE 2 October 2008 Structure and magnetic properties of Fe 36 Co 36 B 19 Si 5 Nb 4 bulk metallic glasses R. Nowosielski, R. Babilas*

More information

Observation of Superconductivity in Highly Cr-Doped GaP Single Crystals

Observation of Superconductivity in Highly Cr-Doped GaP Single Crystals Vol. 110 (2006) ACTA PHYSICA POLONICA A No. 2 Proceedings of the XXXV International School of Semiconducting Compounds, Jaszowiec 2006 Observation of Superconductivity in Highly Cr-Doped GaP Single Crystals

More information

Nanostructure and soft magnetic properties of iron-nitrogen alloys Chezan, Anton Romulus; Boerma, D.O; Niesen, L

Nanostructure and soft magnetic properties of iron-nitrogen alloys Chezan, Anton Romulus; Boerma, D.O; Niesen, L University of Groningen Nanostructure and soft magnetic properties of iron-nitrogen alloys Chezan, Anton Romulus; Boerma, D.O; Niesen, L IMPORTANT NOTE: You are advised to consult the publisher's version

More information

Enhancement of connectivity and flux pinning in MgB2 superconducting bulks and wires

Enhancement of connectivity and flux pinning in MgB2 superconducting bulks and wires University of Wollongong Research Online University of Wollongong Thesis Collection 1954-2016 University of Wollongong Thesis Collections 2009 Enhancement of connectivity and flux pinning in MgB2 superconducting

More information

Magnetic and Magneto-Transport Properties of Mn-Doped Germanium Films

Magnetic and Magneto-Transport Properties of Mn-Doped Germanium Films American Journal of Engineering Research (AJER) e-issn: 2320-0847 p-issn : 2320-0936 Volume-5, Issue-12, pp-308-312 www.ajer.org Research Paper Open Access Magnetic and Magneto-Transport Properties of

More information

Nanostructured Engineered Materials With High Magneto-optic Performance For Integrated Photonics Applications

Nanostructured Engineered Materials With High Magneto-optic Performance For Integrated Photonics Applications Edith Cowan University Research Online School of Engineering Publications 28 Nanostructured Engineered Materials With High Magneto-optic Performance For Integrated Photonics Applications Mikhail Vasiliev

More information

Correlation between microstructure and temperature dependence of magnetic properties in Fe 60 Co 18 ( Nb, Zr ) 6 B 15 Cu 1 alloy series

Correlation between microstructure and temperature dependence of magnetic properties in Fe 60 Co 18 ( Nb, Zr ) 6 B 15 Cu 1 alloy series Correlation between microstructure and temperature dependence of magnetic properties in Fe 60 Co 18 ( Nb, Zr ) 6 B 15 Cu 1 alloy series J. S. Blázquez, V. Franco, C. F. Conde, A. Conde, J. Ferenc, T. Kulik,

More information

S. H. Mahmood Physics Department, The University of Jordan, Amman, Jordan, Phone: (962)

S. H. Mahmood Physics Department, The University of Jordan, Amman, Jordan,   Phone: (962) Hopkinson peak and superparamagnetic effects in BaFe 12 xga xo19 nanoparticles S. H. Mahmood Physics Department, The University of Jordan, Amman, Jordan, E-mail: s.mahmood@ju.edu.jo, Phone: (962) 796709673.

More information

More Thin Film X-ray Scattering and X-ray Reflectivity

More Thin Film X-ray Scattering and X-ray Reflectivity Stanford Synchrotron Radiation Laboratory More Thin Film X-ray Scattering and X-ray Reflectivity Mike Toney, SSRL 1. Introduction (real space reciprocal space) 2. Polycrystalline film (no texture) RuPt

More information

Application of computed tomography for an analysis of composite with fine dispersive reinforcement made of the Fe 65 Co 10 Ni 3 W 2 B 20 alloy

Application of computed tomography for an analysis of composite with fine dispersive reinforcement made of the Fe 65 Co 10 Ni 3 W 2 B 20 alloy Volume 83 Issue 1 January 2017 Pages 17-22 International Scientific Journal published monthly by the World Academy of Materials and Manufacturing Engineering Application of computed tomography for an analysis

More information

Epitaxy and Roughness Study of Glancing Angle Deposited Nanoarrays. Hamid Alouach and G. J. Mankey

Epitaxy and Roughness Study of Glancing Angle Deposited Nanoarrays. Hamid Alouach and G. J. Mankey Epitaxy and Roughness Study of Glancing Angle Deposited Nanoarrays Hamid Alouach and G. J. Mankey Introduction Objective: Approach: Characterization: Fabrication of nanoscale magnetic wires for spin transport

More information

Chapter 2 Metallic Glasses

Chapter 2 Metallic Glasses Chapter 2 Metallic Glasses Metallic glasses, which exhibit many fascinating properties, have been developed during the past half century. The atomic structure has been basically understood by using a dense

More information

THE magnetic recording media that is currently in use,

THE magnetic recording media that is currently in use, IEEE TRANSACTIONS ON MAGNETICS, VOL. 43, NO. 2, FEBRUARY 2007 693 Fabrication, Microstructure, Magnetic, and Recording Properties of Percolated Perpendicular Media David E. Laughlin 1, Yingguo Peng 2,

More information

INTRODUCTION TO MAGNETIC MATERIALS

INTRODUCTION TO MAGNETIC MATERIALS INTRODUCTION TO MAGNETIC MATERIALS Second Edition B. D. CULLITY University of Notre Dame С D. GRAHAM University of Pennsylvania 4>IEEE PRESS WILEY A JOHN WILEY & SONS, INC., PUBLICATION PREFACE TO THE

More information

This lecture is part of the Basic XRD Course.

This lecture is part of the Basic XRD Course. This lecture is part of the Basic XRD Course. Basic XRD Course 1 A perfect polycrystalline sample should contain a large number of crystallites. Ideally, we should always be able to find a set of crystallites

More information

International Journal of Engineering & Technology IJET-IJENS Vol:14 No:01 88

International Journal of Engineering & Technology IJET-IJENS Vol:14 No:01 88 International Journal of Engineering & Technology IJET-IJENS Vol:14 No:01 88 Effect of Temperature On Ba (1-x) Sr x Fe 11.4 Ti (0.3) Mn (0.3) O 19 (x = 0.3, 0.7) Against Crystallite Size Characterization

More information

Accumulation (%) Amount (%) Particle Size 0.1

Accumulation (%) Amount (%) Particle Size 0.1 100 10 Amount (%) 5 50 Accumulation (%) 0 0.1 1 Particle Size (µm) 10 0 Supplementary Figure 1. The particle size distribution of W-15 at% Cr after 20 hours milling. Supplementary Figure 2. a,b, X-ray

More information

This thesis lays importance in the preparation and characterization of a few selected representatives of the ferrite family in the nanoregime.

This thesis lays importance in the preparation and characterization of a few selected representatives of the ferrite family in the nanoregime. Preface Nanotechnology is an all inclusive one and is increasingly playing a lead role not only in material science, but also in areas like biology, information technology, photonics and biotechnology.

More information

Magnetic anisotropy in iron thin films evaporated under ultra-high vacuum

Magnetic anisotropy in iron thin films evaporated under ultra-high vacuum Magnetic anisotropy in iron thin films evaporated under ultra-high vacuum J. Dinhut, J. Eymery, R. Krishnan To cite this version: J. Dinhut, J. Eymery, R. Krishnan. Magnetic anisotropy in iron thin films

More information

Depth-sensitive characterization of surface magnetic properties. Životský, K. Postava, K. Hrabovská, A. Hendrych, J. Pištora

Depth-sensitive characterization of surface magnetic properties. Životský, K. Postava, K. Hrabovská, A. Hendrych, J. Pištora Depth-sensitive characterization of surface magnetic properties of as-quenched FeNbB ribbons O. Životský, K. Postava, K. Hrabovská, A. Hendrych, J. Pištora Department of Physics, Technical University of

More information

Defense Technical Information Center Compilation Part Notice ADP014314

Defense Technical Information Center Compilation Part Notice ADP014314 UNCLASSIFIED Defense Technical Information Center Compilation Part Notice ADP014314 TITLE: Microstructure and Magnetic Property of Llo CoPt-20 at.% C Magnetic Thin Film DISTRIBUTION: Approved for public

More information

Dilute magnetic semiconductors. Iuliia Mikulska University of Nova Gorica Doctoral study, programme physics

Dilute magnetic semiconductors. Iuliia Mikulska University of Nova Gorica Doctoral study, programme physics Dilute magnetic semiconductors Iuliia Mikulska University of Nova Gorica Doctoral study, programme physics Spintronics Spintronics (a neologism meaning "spin transport electronics"), also known as magnetoelectronics

More information

OPTIMIZING XRD DATA. By: Matthew Rayner

OPTIMIZING XRD DATA. By: Matthew Rayner OPTIMIZING XRD DATA By: Matthew Rayner 1 XRD Applications PANalytical classifies XRD applications in 4 groups 1. Powders 2. Nanomaterials 3. Solid objects 4. Thin films Many day-to-day samples cross these

More information

an amorphous magnet are distributed randomly, resulting in a disordered state and physicists are rather perplexed in explaining the magnetic order

an amorphous magnet are distributed randomly, resulting in a disordered state and physicists are rather perplexed in explaining the magnetic order Preface Magnetic materials have been playing an important role in the day today life of human beings from the time lodestone was discovered. They form part of many devices and the field of magnetism today

More information

Spin pumping and tuning of magnetization damping by spin Hall currents. Hubert Głowiński

Spin pumping and tuning of magnetization damping by spin Hall currents. Hubert Głowiński Spin pumping and tuning of magnetization damping by spin Hall currents Hubert Głowiński Institute of Molecular Physics, Polish Academy of Sciences, Poland This work has been carried out within Project

More information

AMORPHISATION PROCESS DURING MECHANICAL ALLOYING OF Al-Fe-Ti POWDERS AND CRYSTALLISATION OF THE MILLING PRODUCTS

AMORPHISATION PROCESS DURING MECHANICAL ALLOYING OF Al-Fe-Ti POWDERS AND CRYSTALLISATION OF THE MILLING PRODUCTS Amorphisation Rev.Adv.Mater.Sci. process 18(2008) during 393-397 mechanical alloying of Al-Fe-Ti powders and crystallisation of... 393 AMORPHISATION PROCESS DURING MECHANICAL ALLOYING OF Al-Fe-Ti POWDERS

More information

Journal of Nuclear and Radiochemical Sciences, Vol. 11, No.1, pp. 1-5, 2010

Journal of Nuclear and Radiochemical Sciences, Vol. 11, No.1, pp. 1-5, 2010 Journal of Nuclear and Radiochemical Sciences, Vol. 11, No.1, pp. 1-5, 2010 Characterization of 57 Fe Implanted and Annealed SnO 2 (3 % Sb) Films by Depth Selective Conversion Electron Mössbauer Spectroscopy

More information

Magnetic Properties of Epitaxial (Ge,Mn)Te Thin Films with Varying Crystal Stoichiometry

Magnetic Properties of Epitaxial (Ge,Mn)Te Thin Films with Varying Crystal Stoichiometry Vol. 114 (2008) ACTA PHYSICA POLONICA A No. 5 Proc. XXXVII International School of Semiconducting Compounds, Jaszowiec 2008 Magnetic Properties of Epitaxial (Ge,Mn)Te Thin Films with Varying Crystal Stoichiometry

More information

Vertical nano-composite heteroepitaxial thin films with manganites and ferroelectrics. Yonghang Pei Physics Department

Vertical nano-composite heteroepitaxial thin films with manganites and ferroelectrics. Yonghang Pei Physics Department Vertical nano-composite heteroepitaxial thin films with manganites and ferroelectrics Yonghang Pei Physics Department Outline Introduction to MultiFerroics La 1 x Sr x MnO 3 Experiment Summary and Future

More information

Silver Diffusion Bonding and Layer Transfer of Lithium Niobate to Silicon

Silver Diffusion Bonding and Layer Transfer of Lithium Niobate to Silicon Chapter 5 Silver Diffusion Bonding and Layer Transfer of Lithium Niobate to Silicon 5.1 Introduction In this chapter, we discuss a method of metallic bonding between two deposited silver layers. A diffusion

More information

Development of New Generation Of Coatings with Strength-Ductility Relationship, Wear, Corrosion and Hydrogen Embrittlement Resistance Beyond the

Development of New Generation Of Coatings with Strength-Ductility Relationship, Wear, Corrosion and Hydrogen Embrittlement Resistance Beyond the Development of New Generation Of Coatings with Strength-Ductility Relationship, Wear, Corrosion and Hydrogen Embrittlement Resistance Beyond the Current Materials Accomplishments till date As the structural

More information

Transmission electron microscopy (TEM)

Transmission electron microscopy (TEM) Supplemental material for the Applied Physics Letter Hysteretic anomalous Hall effect in a ferromagnetic, Mn-rich Ge:Mn nanonet Danilo Bürger, Shengqiang Zhou, Marcel Höwler, Xin Ou, György J. Kovacs,

More information

Crack initiation and fracture features of Fe Co B Si Nb bulk metallic glass during compression

Crack initiation and fracture features of Fe Co B Si Nb bulk metallic glass during compression Focussed on Crack Paths Crack initiation and fracture features of Fe Co B Si Nb bulk metallic glass during compression S. Lesz, A. Januszka, S. Griner, R. Nowosielski Silesian University of Technology,

More information