Magnetization arrangement of hard magnetic phases and mechanism of magnetization and reversal magnetization of nano-composite magnets

Transactions of Nonferrous Metals Society of China (English Edition)

Volumn 19, Issue 5, 2009, Pages 1131-1145

  LIU, Xin cai ^a   XIE, Ren ^a   PAN, Jing ^a  

^a NINGBO UNIVERSITY   (China)

Author keywords

arrangement of easy magnetization axis; coercivity; hard magnetic phases; L10 FePt; mechanism of magnetization; nano composite magnets; ordering; permanent magnets; reversal magnetization; size effect

Indexed keywords

ARRANGEMENT OF EASY-MAGNETIZATION-AXIS; AXIS COERCIVITY; COERCIVITY; HARD MAGNETIC PHASES; HARD MAGNETIC PHASIS; NANO-COMPOSITE MAGNETS; SIZE EFFECTS;

COERCIVE FORCE; DIES; MAGNETIC BUBBLES; MAGNETIC DEVICES; MAGNETIC MATERIALS; MAGNETISM; MORPHOLOGY; NANOCOMPOSITES; PERMANENT MAGNETS; PLATINUM; ROTATION; SINGLE CRYSTALS; SINTERING; SIZE DETERMINATION;

MAGNETIZATION REVERSAL;

EID: 76449110882     PISSN: 10036326     EISSN: None     Source Type: Journal    
DOI: 10.1016/S1003-6326(08)60419-7     Document Type: Article

References (50)

1. SKOMAKI R., and COEY J.M. Giant energy product in nanostructured two-phase magnets [J]. Phy Rev B 48 (1993) 15812-15816
2. GUO P.-j., LIU X.-c., PAN J., LI Y., and CUI P. Recent progress of nonaocomposite magnet by die-upset [J]. Rare Metal Materials and Engineering 37 3 (2008) 377-381 (in Chinese).
3. LIU S., HIGGINS A., BAUSER S., CHEN C., LEE D., SHEN Y., HE Y., and HUANG M.Q. Enhancing magnetic properties of bulk anisotropic Nd-Fe-B/α-Fe composite magnets by applying powder coating technologies [J]. IEEE Trans Magn 42 10 (2006) 2912-2914
4. LEONOWICZ M., DEREWNCKA D., WOZNAK M., and DAVIES H.A. Processing of high-performance anisotropic permanent magnets by die-upset forging [J]. J Mat Processing Technology 153/154 1/3 (2004) 860-867
5. KIM H., CHO S., KIM Y., KIM H., and KAPUSTIN G.A. Nanocrystalline NdFeB magnets fabricated by a modified hot-working process [J]. J Appl Phy 93 (2002) 8137-8139
6. TAKEZAWA M., AIBA K., YASUDA H., MORIMOTO Y., HIDAKA T., YAMASAKI J., KATO H., and YAGI M. Effect of Nd-rich phase on c-axis orientation of Nd-Fe-B melt-spun magnet and its domain structure [J]. J Magn Magn Mat 310 (2006) 2572-2574
7. GUO Peng-ju, LIU Xin-cai, PAN Jing, LI Yong, CUI Ping. Coercivity mechanism models and influential factors of Nd-Fe-B nano-composite magnets [J]. Rare Earth, 2009, to be submitted.
8. LIU X.-c., PAN J., XU Z.-f., ZHUANG J.-p., LIU M., YU D.-m., SHI Z.-x., and FU H.-z. Machinable REPM with excellent intrinsic coercive force prepared by DS technology [J]. J Mat Science & Technology 13 6 (1997) 475-478
9. FU H.-z., LIU X.-c., SHI Z.-x., WANG L.-y., and TANG W. The studies of directional solidified RE-Co magnets [J]. IEEE Transactions on Magnetics 25 6 (1989) 3797-3799
10. LIU X.-c., TANG W., SHI Z.-x., WANG L.-y., and FU H.-z. Compositions area of rare earth cobalt alloys with easy axis of sample parallel to the constrained growth direction [J]. Journal of Northwestern Polytechnical University 9 Extra Issue (1991) 124-130 (in Chinese).
11. 14B [J]. Journal of Rare Earths 24 (2006) 302-305
12. 5 alloy at lower crystal growth speeds [J]. Journal of Magnetic Materials and Devices 34 4 (2003) 1-7
13. PAN Jing, LIU Xin-cai, GUO Peng-ju, XIE Ren, ZHANG Hui, XU Feng, ZHANG Wen-wang, LI Zhu-bai. Effects of interaction between substrates and heat flow on solidification characteristics of Nd-Fe-B alloys [C]// MRS International Materials Research Conference. Chongqing, China, 2008: 229.
14. 8 sintered magnets and its microstructures evolution [J]. Journal of Rare Earths 23 2 (2005) 208-215
15. PAN J., and LIU X.-c. Microstructures in transition zone of a laser remelting/solidification pool of sintered Nd-Fe-B magnets [J]. Journal of Chinese Rare Earth Society 22 2 (2004) 219-224 (in Chinese).
16. 8 magnets [J]. The Chinese Journal of Nonferrous Metals 14 7 (2004) 1183-1187 (in Chinese).
17. 14B solidified in the surface layer of anisotropic sintered-magnets [J]. Rare Metals 25 s (2006) 498-501
18. LIU Xin-cai, PAN Jing, GUO Peng-ju, XIE Ren, ZHANG Hui, XU Feng, ZHANG Wen-wang, LI Zhu-bai, GUO Bao-hui. Solidification processes of Nd-Fe-B permanent magnets [C]// MRS International Materials Research Conference. Chongqing, China, 2008: 228-229.
19. SHIMODA T., AKIOKA K., KOBAYASHI O., and YAMAGAMI T. High-energy cast Pr-Fe-B magnets [J]. J Appl Phy 64 (1988) 5290-5292
20. LIU X.-c., PAN J., XU Z.-f., ZHUANG J.-p., LIU M., YU D.-m., and CAI C.-c. Achievement of [006] texture in PrFeB permanent magnets [J]. Functional Materials 22 3 (1997) 253-255
21. PAN J., and LIU X.-c. Microstructure characteristics of hot-pressing Pr-Fe-B-Cu [J]. J Appl Phy 93 (2003) 8677-8679
22. CHEN S.K., HSU C.W., YUAN F.T., HSIAO S.N., CHANG H.W., SUN A.C., LIAO W.M., WEI O.H., LEE H.Y., HUANG H.W., HSU Y.W., and YAO Y.D. Effect of Ag segregation on reversal behavior of (FePt)Ag alloy thin films [J]. IEEE Trans Magn 43 (2007) 3001-3003
23. 0 ordered FePt films [J]. J Appl Phy 94 (2003) 5672-5677
24. RONG C.B., LI Y., and LIU J.P. Curie temperatures of annealed FePt nanoparticle systems [J]. J Appl Phy 101 (2007) 09K505
25. KNELLER E.F., and HAWIG R. A new material principle for permanent magnets [J]. IEEE Trans Magn 27 (1991) 3588-3600
26. SABIRYANOV R.F., and JASWAL S.S. Electronic structure and magnetic properties of hard/soft multilayers [J]. J Magn Magn Mat 177/181 (1998) 989-990
27. 0-FePt with CoAg underlayer [J]. J Appl Phy 101 (2007) 053913
28. 0 ordered domains [J]. J Appl Phy 101 (2007) 093911
29. LEE Y.M., LEE B.S., LEE C.G., KOO B.H., and SHIMADA Y. Effect of boron addition on disorder-order transformation of FePt thin films [J]. J Magn Magn Mat 310 (2007) e918-e920
30. 0 chemical ordering in Ag-doped FePt nanoparticles [J]. Chemical Phy Lett 443 (2007) 319-322
31. 0 ordering of chemically synthesized FePt nanoparticles [J]. Scripta Materialia 53 (2005) 411-416
32. ZHANG L.J., CAI J.W., and PAN H.Y. Ordering promotion and intergrain decoupling in FePt thin films by Ta and Ta/Bi buffer layers [J]. J Appl Phy 102 (2007) 013905
33. 0 ordering [J]. J Magn Magn Mat 266 (2003) 79-87
34. YUAN F.T., CHANG H.W., LIAO W.M., HSIAO S.N., CHEN S.K., YAO Y.D., and LEE H.Y. Preannealing effect on the ordering transformation and magnetic properties of CoPt thin films [J]. J Appl Phy 101 (2007) 09K526
35. 0 ordering of off-stoichiometric FePt (001) thin films at reduced temperature [J]. Appl Phy Lett 82 (2003) 2461-2463
36. 0 ordered FePt alloy by alternate monatomic layer deposition [J]. Appl Phy Lett 81 (2002) 288-290
37. SEKI T., SHIMA T., TAKAHASHI K., TAKAHASHI Y., MATSUBARA E., TAKANASHI Y.K., and HONO K. Influence of the buffer layers on magnetic properties of FePt (001) films sputter-deposited at reduced temperature [J]. J Appl Phy 96 (2004) 1127-1132
38. RONG C.B., NANDWANA V., POUDYAL N., and LIU J.P. Bulk FePt-based nano-composite magnets with enhanced exchanging coupling [J]. J Appl Phy 102 (2007) 023908
39. 0 FePt films [J]. J Magn Magn Mat 310 (2007) e916-e917
40. SHIMA T., TAKAHASHI K., TAKAHASHI Y.K., and HONOR K. Coercivity exceeding 100 kOe in epitaxially grown FePt sputtered films [J]. Appl Phy Lett 85 (2004) 2571-2573
41. SHIMA T., TAKAHASHI K., TAKASHI K.Y., and HONOR K. Preparation and magnetic properties of highly coercive FePt films [J]. Appl Phy Lett 81 (2002) 1050-1052
42. TAKAHASHI Y.K., SEKI T., HONOR K., SHIMA T., and TAKAHASHI K. Microstructure and magnetic properties of FePt and Fe/FePt polycrystalline films with high coercivity [J]. J Appl Phy 96 (2004) 475-481
43. 0 nanoparticles [J]. Phy Rev B 67 (2003) 094422
44. 30 alloy with high coercivity [J]. Appl Phy Lett 85 (2004) 789-791
45. CHRISTODOULIDES J.A., BONDER M.J., HUANG Y., ZHANG Y., STOYANOV S., HADJIPANAYIS G.C., SIMOPOULOS A., and WELLER D. Intrinsic and hysteresis properties of FePt nanoparticles [J]. Phy Rev B 68 (2003) 054428
46. LUO C.P., and SELLMYER D. Magnetic properties and structure of Fe/Pt thin films [J]. IEEE Trans Magn 31 (1995) 2764-2766
47. 0 FePt nanoparticles [J]. Phy Rev B 72 (2005) 144419
48. TAKAHASHI Y.K., OHKUBO T., OHNUMA M., and HONO K. Size effect on the ordering of FePt granular films [J]. J Appl Phy 93 (2003) 7166-7168
49. 0-FePt nanoparticles [J]. Advanced Materials 18 (2006) 2984-2988
50. FARLE M., BABERSCHKE K., STETTER U., ASPELMEIER A., and GERHARDTER F. Thickness-dependent Curie temperature of Gd(0001)/W(110) and its dependence on the growth conditions [J]. Rhy Rew B 17 (1993) 11571-11574