重点探讨Nd-Fe-B基纳米复合永磁材料晶间交换耦合作用对有效各向异性和矫顽力的影响,对Nd-Fe-B基纳米复合永磁材料矫顽力机制进行讨论分析.硬磁相之间的耦合在反磁化场作用下将促进畴壁位移和磁距反转,不利于提高纳米复合永磁材料的矫顽力,在晶间形成适当的非磁性相减弱硬磁相之间的耦合作用可一定程度地提高纳米复合永磁材料矫顽力.除形核场、自钉扎作用外,晶粒内部缺陷的钉扎效应能阻止反磁化畴壁的位移,可进一步提高纳米复合永磁材料矫顽力.
参考文献
[1] | Coehoorn R;De Mooij D B;Duchateau J P W B et al.[J].Journal of Physics,1988,49(C8):669. |
[2] | Skomski R;Coey J M D .[J].Physical Review B,1993,48(21):15812. |
[3] | 郭鹏举,刘新才,潘晶,李勇,崔平.热变形纳米复合磁体[J].稀有金属材料与工程,2008(03):377-381. |
[4] | The ND;Hoa NQ;Oh SK;Yu SC;Anh HD;Vu LV;Chau N .Crystalline evolution and large coercivity in Dy-doped (Nd, Dy)(2)Fe14B/alpha- Fe nanocomposite magnets[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,2007(26):119-122. |
[5] | Kwon H W;Zhang Y;Hadjipanayis G C .[J].Journal of Magnetism and Magnetic Materials,2006,303(02):410. |
[6] | I. Betancourt;G. Cruz-Arcos;T. Schrefl .Coercivity enhancement in boron-enriched stoichiometric REFeB melt-spun alloys[J].Acta materialia,2008(17):4890-4895. |
[7] | Spyra M;Leonowicz M .[J].Journal of Magnetism and Magnetic Materials,2008,320(14):46. |
[8] | Zhang S;Xu H;Tan X et al.[J].Journal of Alloys and Compounds,2008,459(1-2):41. |
[9] | Fischer R;Kronmü ller H .[J].Journal of Magnetism and Magnetic Materials,1999,191(1-2):225. |
[10] | Herzer G. .Grain size dependence of coercivity and permeability in nanocrystalline ferromagnets[J].IEEE Transactions on Magnetics,1990(5):1397-1402. |
[11] | Gao R W;Feng W C;Liu H Q et al.[J].Journal of Applied Physics,2003,94(01):664. |
[12] | 荣传兵,张宏伟,陈仁杰,贺淑莉,张绍英,沈保根.纳米晶永磁材料晶间交换耦合作用的模拟计算研究[J].物理学报,2004(12):4353-4358. |
[13] | Kelly P.E.;O'Grady K. .Switching mechanisms in cobalt-phosphorus thin films[J].IEEE Transactions on Magnetics,1989(5):3881-3883. |
[14] | Li SD.;Gu BX.;Bi H.;Tian ZJ.;Xie GZ.;Zhu YJ.;Du YW. .Role of amorphous grain boundaries in nanocomposite NdFeB permanent magnets[J].Journal of Applied Physics,2002(12):7514-7518. |
[15] | Li W;Li X .[J].Journal of Applied Physics,2006,99(12):126103-126101. |
[16] | Kim E C;Kim S J;Baek J K et al.[J].Hyperfine Interactions,2008,183:1. |
[17] | Ohkubo T;Miyoshi T;Hirosawa S et al.[J].Materials Science and Engineering,2007,A 448-451:435. |
[18] | Y. Sun;G.B. Han;M. Liu .Intergranular phase dependence of anisotropy and coercivity in nanoscaled permanent magnets[J].Materials Letters,2007(21):4294-4296. |
[19] | Bauer J.;Zern A.;Kronmuller H.;Seeger M. .NANOCRYSTALLINE FENDB PERMANENT MAGNETS WITH ENHANCED REMANENCE[J].Journal of Applied Physics,1996(3):1667-1673. |
[20] | Zhao G P;Zhao M G;Lim H S et al.[J].Applied Physics Letters,2005,87(16):162513-162511. |
[21] | Zhao G P;Wang X L;Yang C et al.[J].Journal of Applied Physics,2007,101(09):09K102-09K101. |
[22] | Zhao GP;Zhang HW;Feng YP;Yang C;Huang CW .Nucleation or pinning: Dominant coercivity mechanism in exchange-coupled permanent/composite magnets[J].Computational Materials Science,2008(1):122-126. |
[23] | Zhang W Y;Stoica M;Chang H W et al.[J].Materials Science and Engineering B:Solid State Materials for Advanced Technology,2008,149(01):73. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%