Asymmetric reversal in inhomogeneous magnetic heterostructures.
Asymmetric reversal in inhomogeneous magnetic heterostructures.
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DOI：
10.1103/physrevlett.96.217205
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发表时间：
2006-03
影响因子：
8.6
通讯作者：
Zhi-Pan Li;O. Petracic;R. Morales;J. Olamit;X. Batlle;Kai Liu;I. Schuller
中科院分区：
文献类型：
--
作者：
Zhi-Pan Li;O. Petracic;R. Morales;J. Olamit;X. Batlle;Kai Liu;I. Schuller
反铁磁/铁磁（AF/FM）交换偏置双层膜中的非对称磁化反转是一种罕见的现象。我们在一个简单的模型系统中通过实验和模拟（假设界面AF力矩分布不均匀）研究了这种现象。结果表明，所观察到的不对称性源于系统的固有对称性破缺，这导致了与FM的负饱和相反的平行于界面的局部不完整畴壁。磁光克尔效应明确地证实了这种不对称反转和深度依赖的FM畴壁与磁场测量和模拟雅阁。
Asymmetric magnetization reversal is an unusual phenomenon in antiferromagnet/ferromagnet (AF/FM) exchange biased bilayers. We investigated this phenomenon in a simple model system experimentally and by simulation assuming inhomogeneously distributed interfacial AF moments. The results suggest that the observed asymmetry originates from the intrinsic broken symmetry of the system, which results in local incomplete domain walls parallel to the interface in reversal to negative saturation of the FM. The magneto-optical Kerr effect unambiguously confirms such an asymmetric reversal and a depth-dependent FM domain wall in accord with the magnetometry and simulations.