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arXiv 0906.4744cond-mat.mtrl-sci
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Co/Pt多层膜中阻挫驱动的条纹畴形成

Frustration Driven Stripe Domain Formation in Co/Pt Multilayer Films

J. E. Davies, O. Hellwig, E. E. Fullerton, M. Winklhofer, R. D. Shull, Kai Liu

摘要:

我们报告的一个不寻常的磁化反转行为在Co/Pt多层膜的一阶反转曲线突出的主要回路外的微观机制。透射X射线显微镜揭示了一个破碎的条纹域地形时,磁场被逆转之前饱和,在相反的互连图案时,从饱和状态逆转。不同的域成核和传播行为是由于来自先前场扫描的未湮灭域。这些残留的域有助于随机偶极场,其阻碍随后的域生长并防止域像互连图案那样紧密地生长在一起。

英文摘要:

We report microscopic mechanisms for an unusual magnetization reversal behavior in Co/Pt multilayers where some of the first-order reversal curves protrude outside of the major loop. Transmission x-ray microscopy reveals a fragmented stripe domain topography when the magnetic field is reversed prior to saturation, in contrast to an interconnected pattern when reversing from a saturated state. The different domain nucleation and propagation behaviors are due to unannihilated domains from the prior field sweep. These residual domains contribute to random dipole fields that impede the subsequent domain growth and prevent domains from growing as closely together as for the interconnected pattern.

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