Induced fourfold anisotropy and bias in compensated NiFe/FeMn double layers
Induced fourfold anisotropy and bias in compensated NiFe/FeMn double layers
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DOI：
10.1103/physrevb.68.184418
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发表时间：
2003-07
影响因子：
3.7
通讯作者：
T. Mewes;B. Hillebrands;R. Stamps
中科院分区：
文献类型：
--
作者：
T. Mewes;B. Hillebrands;R. Stamps
一个矢量自旋模型被用来显示如何挫折内的多亚晶格反铁磁体，如FeMn可以导致四重磁各向异性作用于交换耦合铁磁膜。交换偏置存在的可能性进行了检查，并显示存在的情况下，弱的化学无序的界面处，否则完美的结构。通过交换耦合作用于铁磁体的各向异性，发现层间交换的敏感依赖性，并且我们表明，即使对于具有理想平坦界面的完美晶体结构，也可以出现各种各样的各向异性。
A vector spin model is used to show how frustrations within a multisublattice antiferromagnet such as FeMn can lead to fourfold magnetic anisotropies acting on an exchange-coupled ferromagnetic film. Possibilities for theexistence of exchange bias are examined and shown to exist for the case of weak chemical disorder at the interface in an otherwise perfect structure. A sensitive dependence on interlayer exchange is found for anisotropies acting on the ferromagnet through the exchange coupling, and we show that a wide range of anisotropies can appear even for a perfect crystalline structure with an ideally flat interface.