Micromagnetic simulation of Sm-Co/α-Fe/Sm-Co trilayers with various angles between easy axes and the film plane

doi:10.1088/1674-1056/23/9/097504

›› 2014, Vol. 23 ›› Issue (9): 97504-097504.doi: 10.1088/1674-1056/23/9/097504

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Micromagnetic simulation of Sm-Co/α-Fe/Sm-Co trilayers with various angles between easy axes and the film plane

张溪超^a, 赵国平^a, 夏静^a, 岳明^b, 袁新红^a, 谢林华^a

a College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610066, China;
b College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

收稿日期:2014-02-16 修回日期:2014-03-13 出版日期:2014-09-15 发布日期:2014-09-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11074179, 10747007, 51331003, 51371011, and 51001002), the State Key Development Program of Basic Research of China (Grant No. 2010CB934600), the Construction Plan for Scientific Research Innovation Teams of Universities in Sichuan Province, China (Grant No. 12TD008), the Beijing Municipal Natural Science Foundation, China (Grant No. 2122006), and Scientific Research Innovation Fund for Student in Sichuan Normal University, China.

Micromagnetic simulation of Sm-Co/α-Fe/Sm-Co trilayers with various angles between easy axes and the film plane

Zhang Xi-Chao (张溪超)^a, Zhao Guo-Ping (赵国平)^a, Xia Jing (夏静)^a, Yue Ming (岳明)^b, Yuan Xin-Hong (袁新红)^a, Xie Lin-Hua (谢林华)^a

a College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610066, China;
b College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

Received:2014-02-16 Revised:2014-03-13 Online:2014-09-15 Published:2014-09-15
Contact: Zhao Guo-Ping E-mail:zhaogp@uestc.edu.cn;_zapple2004@yahoo.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11074179, 10747007, 51331003, 51371011, and 51001002), the State Key Development Program of Basic Research of China (Grant No. 2010CB934600), the Construction Plan for Scientific Research Innovation Teams of Universities in Sichuan Province, China (Grant No. 12TD008), the Beijing Municipal Natural Science Foundation, China (Grant No. 2122006), and Scientific Research Innovation Fund for Student in Sichuan Normal University, China.

摘要/Abstract

摘要： Hysteresis loops and energy products have been calculated systematically by a three-dimensional (3D) software OOMMF for Sm-Co/α-Fe/Sm-Co trilayers with various thicknesses and β, where β is the angle between the easy axis and the field applied perpendicular to the film plane. It is found that trilayers with a perpendicular anisotropy possess considerably larger coercivities and smaller remanences and energy products compared with those with an in-plane anisotropy. Increase of β leads to a fast decrease of the maximum energy product as well as the drop of both remanence and coercivity. Such a drop is much faster than that in the single-phased hard material, which can explain the significant discrepancy between the experiment and the theoretical energy products. Some modeling techniques have been utilized with spin check procedures performed, which yield results in good agreement with the one-dimensional (1D) analytical and experimental data, justifying our calculations. Further, the calculated nucleation fields according to the 3D calculations are larger than those based on the 1D model, whereas the corresponding coercivity is smaller, leading to more square hysteresis loops and better agreement between experimental data and the theory.

关键词: micromagnetic simulation, hard/soft trilayers, hysteresis loops, magnetization configuration

Abstract: Hysteresis loops and energy products have been calculated systematically by a three-dimensional (3D) software OOMMF for Sm-Co/α-Fe/Sm-Co trilayers with various thicknesses and β, where β is the angle between the easy axis and the field applied perpendicular to the film plane. It is found that trilayers with a perpendicular anisotropy possess considerably larger coercivities and smaller remanences and energy products compared with those with an in-plane anisotropy. Increase of β leads to a fast decrease of the maximum energy product as well as the drop of both remanence and coercivity. Such a drop is much faster than that in the single-phased hard material, which can explain the significant discrepancy between the experiment and the theoretical energy products. Some modeling techniques have been utilized with spin check procedures performed, which yield results in good agreement with the one-dimensional (1D) analytical and experimental data, justifying our calculations. Further, the calculated nucleation fields according to the 3D calculations are larger than those based on the 1D model, whereas the corresponding coercivity is smaller, leading to more square hysteresis loops and better agreement between experimental data and the theory.

Key words: micromagnetic simulation, hard/soft trilayers, hysteresis loops, magnetization configuration

中图分类号: (Magnetization reversal mechanisms)

75.60.Jk

75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects) 75.70.Cn (Magnetic properties of interfaces (multilayers, superlattices, heterostructures)) 75.50.Ss (Magnetic recording materials)

张溪超, 赵国平, 夏静, 岳明, 袁新红, 谢林华. Micromagnetic simulation of Sm-Co/α-Fe/Sm-Co trilayers with various angles between easy axes and the film plane[J]. , 2014, 23(9): 97504-097504.

Zhang Xi-Chao (张溪超), Zhao Guo-Ping (赵国平), Xia Jing (夏静), Yue Ming (岳明), Yuan Xin-Hong (袁新红), Xie Lin-Hua (谢林华). Micromagnetic simulation of Sm-Co/α-Fe/Sm-Co trilayers with various angles between easy axes and the film plane[J]. Chin. Phys. B, 2014, 23(9): 97504-097504.

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Micromagnetic simulation of Sm-Co/α-Fe/Sm-Co trilayers with various angles between easy axes and the film plane

Micromagnetic simulation of Sm-Co/α-Fe/Sm-Co trilayers with various angles between easy axes and the film plane

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