Magnetization structures in thin-film recording media
Magnetization structures in thin-film recording media
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薄膜记录介质中的磁化结构
DOI：
10.1109/20.102927
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
H. Bertram
中科院分区：
文献类型：
--
作者：
J. Zhu;H. Bertram
对平面各向同性薄膜记录介质的磁化构型及其在磁化反转过程中的暂态行为进行了计算机模拟研究。针对不同的介质参数，表征了磁化反转过程中形成的磁化结构。通过磁化涡旋的形成，发现了反转区的形成。多个涡旋的形成在外加电场方向上产生拉长的反向磁区。随机取向的晶体易轴为涡旋的形成提供了自然位置，这是由静磁相互作用促进的。晶间交换耦合显著增强了涡旋运动，磁区通过这些涡旋运动扩展。交换耦合薄膜中存在较大尺寸的电畴。在磁区扩展过程中，涡旋-交叉对可以被产生和湮灭。涡旋、涡旋交叉对或涡旋涡对的湮没完成了局部磁化反转。>；
A computer simulation study of magnetization configurations in planar isotropic thin-film recording media and their transient behavior during magnetization reversal is presented. Magnetization structures formed during magnetization reversal are characterized for various medium parameters. It is found that a reversed region nucleates by formation of a magnetization vortex. Multiple vortex formation yields elongated reverse domains in the applied field direction. Randomly oriented crystalline easy axes provide natural sites for vortex formation, which are facilitated by magnetostatic interactions. Intergranular exchange coupling significantly enhances vortex motion through which domains expand. Large-size domains occur in exchange coupled films. During a domain expansion, vortex-crosstie pairs can be generated and annihilated. Annihilation of vortices, vortex-crosstie pairs, or vortex-vortex pairs completes local magnetization reversal. >