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arXiv 0909.4519cond-mat.mes-hallcond-mat.mtrl-sci
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具有界面的盘形小磁体中的磁化反转

Magnetization reversals in a disk-shaped small magnet with an interface

R. L. Silva, A. R. Pereira, W. A. Moura-Melo

摘要:

我们考虑一个纳米盘,它包含两种具有不同铁磁交换常数的耦合材料。两个介质的公共边界线通过磁盘中心,将系统精确地划分为两个相似的半磁盘。通过一个二维模型,模拟了具有这种线缺陷的非常薄的真实材料,用一个简单的描述研究了穿过界面的涡核运动。本研究的主要结果是,依靠磁耦合连接的介质,涡核可以显着和反复翻转从上到下,反之亦然的界面。这种现象在每次开关过程发生时产生类似于自旋波的突发发射。

英文摘要:

We consider a nanodisk possessing two coupled materials with different ferromagnetic exchange constant. The common border line of the two media passes at the disk center dividing the system exactly in two similar half-disks. The vortex core motion crossing the interface is investigated with a simple description based on a two-dimensional model which mimics a very thin real material with such a line defect. The main result of this study is that, depending on the magnetic coupling which connects the media, the vortex core can be dramatically and repeatedly flipped from up to down and vice versa by the interface. This phenomenon produces burst-like emission of spin waves each time the switching process takes place.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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