Micromagnetic studies on measurements of crystalline anisotropy and magnetostriction in disk media

Micromagnetic studies on measurements of crystalline anisotropy and magnetostriction in disk media
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DOI:
10.1063/1.3545818
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发表时间:
2011-03
影响因子:
3.2
通讯作者:
Wei, Dan
Wei, Dan
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Li, Hongjia;Wei, Dan

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本征磁参数的测量在磁性器件的研究中具有重要意义。建立了包括记录层(RL,CoCrPT-SiO_2,6 nm)、12 nm非磁性中间层和非晶软衬层(a-SuL,FeCo,42 nm)的垂直盘介质的微磁模型,以研究RL中晶体各向异性和磁致伸缩常数的测量方法。通过计算磁滞回线,研究了a-SuL对RL磁特性的影响。分别计算了RL和a-SuL对整个介质扭矩曲线的贡献。如果RL与夹层界面处的本征应力沿面内方向之一,则可由模拟的面内扭矩曲线同时确定晶体各向异性常数K1和磁致伸缩场HMS。
Measurements of intrinsic magnetic parameters are important in the study of magnetic devices. A micromagnetic model is set up for a perpendicular disk media, including a recording layer (RL, CoCrPt-SiO2, 6 nm), a 12-nm nonmagnetic interlayer and an amorphous soft underlayer (a-SUL, FeCo, 42 nm), in order to study the measurement methods of the crystalline anisotropy and magnetostriction constants in the RL. The effects of the a-SUL on the magnetic properties of the RL are studied by calculating the hysteresis loops. The contributions of the RL and a-SUL to the torque curves of the whole media are calculated respectively. If the intrinsic stress at the interface between the RL and interlayer is along one of the in-plane directions, the crystalline anisotropy constant K1 and magnetostriction field Hms can be determined simultaneously from the simulated in-plane torque curves.
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