不同易轴取向下对Nd2Fe14B/Fe65Co35磁性双层膜的微磁学模拟

彭懿; 赵国平; 吴绍全; 斯文静; 万秀琳

doi:10.7498/aps.63.167505

摘要

运用三维数值模拟计算方法，计算了膜面外不同易轴取向下Nd2Fe14B/Fe65Co35磁性双层膜的磁滞回线、角度分布、成核场、矫顽力和磁能积等，并与实验结果进行了细致比较. 计算结果表明：只有当易轴与外场之间的夹角β=0°时，才有明显的成核现象，其成核场和矫顽力均随着软磁相厚度Ls的增加而降低; 随着易轴偏角β的增大，剩磁逐渐减小，磁滞回线的方形度降低，从而磁能积减小，在Ls=1 nm，β=0°时磁能积（561.61 kJ/m3）最大. 理论计算所得的磁滞回线与实验磁滞回线符合得很好，剩磁和矫顽力的理论值与实验值相差很小.

关键词:

Abstract

The hysteresis loops, angular distribution, nucleation field, coercivity and energy product are calculated by three-dimensional micromagnetic method for Nd2Fe14B/Fe65Co35 bilayers with a deviation of the easy axis, and the results are compared with the experimental results. The results show that obvious nucleation can be observed only when the β between the easy axis and the applied field is equal to 0°, and the nucleation field and the coercivity decrease as the thickness of the soft phase Ls increases. The remanence decreases and the squareness of the hysteresis loop weakens as β increases, leading to the decrease of the energy product while the largest maximum energy product (561.61 kJ/m3) occurs at Ls=1 nm and β=0°. The shapes of the hysteresis loops, the remanence and the coercivity obtained from calculations and experiments are close to each other.

Keywords:

作者及机构信息

1.
四川师范大学物理与电子工程学院, 成都 610068

基金项目: 国家自然科学基金（批准号：11074179，10747007）、四川省高等学校科研创新团队建设计划（批准号：12TD008）和四川师范大学学生科研创新计划资助的课题.

Authors and contacts

1.
College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068, China

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 11074179, 10747007), the Scientific Research Innovation Team Program of Institution of Higher Education of Sichuan Province, China (Grant No. 12TD008), and the Scientific Research Innovation Program for Student of Sichuan Normal University, China.

参考文献

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[28]	Zhao G P, Zhao M G, Lim H S, Feng Y P, Ong C K 2005 Appl. Phys. Lett. 87 162513
[29]	Zhao G P, Wang X L 2006 Phys. Rev. B 74 012409
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[35]	Xia J, Zhang X C, Zhao G P 2013 Acta Phys. Sin. 62 227502 (in Chinese) [夏静, 张溪超, 赵国平 2013 62 227502]

施引文献

[1]	Kneller E F, Hawig R 1991 IEEE Trans. Magn. 27 3588
[2]	Skomski R, Coey J M D 1993 Phys. Rev. B 48 15812
[3]	Schrefl T, Kronmller H, Fidler J 1993 J. Magn. Magn. Mater. 127 L273
[4]	Shindo M, Ishizone M, Sakuma A, Kato H, Miyazaki T 1997 J. Appl. Phys. 81 4444
[5]	Ping D H, Hono K, Hirosawa S 1998 J. Appl. Phys. 83 7769
[6]	Guo Z J, Jiang J S, Pearson J E, Bader S D, Liu J P 2002 Appl. Phys. Lett. 81 2029
[7]	Liu W, Zhang Z D, Liu J P, Chen L J, He L L, Liu Y, Sun X K, Sellmyer D J 2002 Adv. Mater. 14 1832
[8]	Jiang J S, Pearson J E, Liu Z Y, Kabius B, Trasobares S, Miller D J, Bader S D, Lee D R, Haskel D, Srajer G, Liu J P 2004 Appl. Phys. Lett. 85 5293
[9]	Zhao G P, Zhou G, Zhang H W, Feng Y P, Xian C W, Zhang Q X 2008 Comput. Mater. Sci. 44 117
[10]	Feng C, Zhan Q, Li B H, Teng J, Li M H, Jiang Y, Yu G H 2009 Acta Phys. Sin. 58 3503 (in Chinese) [冯春, 詹倩, 李宝河, 滕蛟, 李明华, 姜勇, 于广华 2009 58 3503]
[11]	Chen R J, Rong C B, Zhang H W, He S L, Zhang S Y, Shen B G 2004 Acta Phys. Sin. 53 4341 (in Chinese) [陈仁杰, 荣传兵, 张宏伟, 贺淑莉, 张绍英, 沈保根 2004 53 4341]
[12]	Xian C W, Zhao G P, Zhang Q X, Xu J S 2009 Acta Phys. Sin. 58 3509 (in Chinese) [鲜承伟, 赵国平, 张庆香, 徐劲松 2009 58 3509]
[13]	Ma B, Wang H, Zhao H B, Sun C G, Acharya R, Wang J P 2010 IEEE Trans. Magn. 46 2345
[14]	Hou H C, Liao J W, Lin H J, Chang F H, Chen R Z, Chiu C H, Lai C H 2011 J. Appl. Phys. 109 07C104
[15]	Belemuk A M, Chui S T 2011 J. Appl. Phys. 109 093909
[16]	Guo G H, Zhang G F, Wang X G 2011 Acta Phys. Sin. 60 107503 (in Chinese) [郭光华, 张光富, 王希光 2011 60 107503]
[17]	Li Z B, Shen B G, Sun J R 2013 J. Appl. Phys. 113 013902
[18]	Li Z B, Shen B G, Niu E, Sun J R 2013 Appl. Phys. Lett. 103 062405
[19]	Li Z B, Zhang M, Shen B G, Sun J R 2013 Appl. Phys. Lett. 102 102405
[20]	Li Y Q, Yue M, Zuo J H, Zhang D T, Liu W Q, Zhang J X, Guo Z H, Li W 2013 IEEE Trans. Magn. 49 3391
[21]	Li H L, Lou L, Hou F C, Guo D F, Li W, Li X H, Gunderov D, Sato K, Zhang X Y 2013 Appl. Phys. Lett. 103 142406
[22]	Huang C W, Chen Z H, Chen L 2013 J. Appl. Phys. 113 094101
[23]	Wang F, Zhang J, Zhang J, Wang C L, Wang Z F, Zeng H, Zhang M G, Xu X H 2013 Appl. Surf. Sci. 271 390
[24]	Poudyal N, Liu J P 2013 J. Phys. D: Appl. Phys. 46 043001
[25]	Liu W, Liu X H, Cui W B, Gong W J, Zhang Z D 2013 Chin. Phys. B 22 027104
[26]	Shi Z, Du J, Zhou S M 2014 Chin. Phys. B 23 027503
[27]	Leineweber T, Kronmller H 1997 J. Magn. Magn. Mater. 176 145
[28]	Zhao G P, Zhao M G, Lim H S, Feng Y P, Ong C K 2005 Appl. Phys. Lett. 87 162513
[29]	Zhao G P, Wang X L 2006 Phys. Rev. B 74 012409
[30]	Asti G, Ghidini M, Pellicelli R, Pernechele C, Solzi M, Albertili F, Casoli F, Fabbrici S, Pareti L 2006 Phys. Rev. B 73 094406
[31]	Cui W B, Takahashi Y K, Hono Y 2012 Adv. Mater. 24 6530
[32]	Xia J, Zhao G P, Zhang H W, Cheng Z H, Feng Y P 2012 J. Appl. Phys. 112 013918
[33]	Donahue M J, Porter D J 1999 OOMMF Use's Guide, Version 1.0 (Gaithersburg: National Institute of Standards and Technology)
[34]	Zhang X C, Zhao G P, Xia J 2013 Acta Phys. Sin. 62 218702 (in Chinese) [张溪超, 赵国平, 夏静 2013 62 218702]
[35]	Xia J, Zhang X C, Zhao G P 2013 Acta Phys. Sin. 62 227502 (in Chinese) [夏静, 张溪超, 赵国平 2013 62 227502]

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