Asymmetric reversal modes in ferromagnetic/antiferromagnetic multilayers.
Asymmetric reversal modes in ferromagnetic/antiferromagnetic multilayers.
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DOI：
10.1103/physrevlett.91.187201
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发表时间：
2003-10
影响因子：
8.6
通讯作者：
B. Beckmann;U. Nowak;K. Usadel
中科院分区：
文献类型：
--
作者：
B. Beckmann;U. Nowak;K. Usadel
实验上，在某些交换偏置系统中发现了反转模的不对称性。从畴态模型的数值研究证据表明，这种效果取决于反铁磁体的易磁化轴和所施加的磁场之间的角度。根据这个角度，铁磁体或者对称地反转，例如，通过在环的两侧上的相干旋转，或者反转是不对称的，对于上升分支具有不均匀的反转模式，这甚至可以产生零垂直磁化。
Experimentally an asymmetry of the reversal modes has been found in certain exchange bias systems. From a numerical investigation of the domain state model evidence is gained that this effect depends on the angle between the easy axis of the antiferromagnet and the applied magnetic field. Depending on this angle the ferromagnet reverses either symmetrically, e.g., by a coherent rotation on both sides of the loop, or the reversal is asymmetric with a nonuniform reversal mode for the ascending branch, which may even yield a zero perpendicular magnetization.