Investigations on magnetostatic interactions among CoFeB layers with perpendicular anisotropy in [Ta/CoFeB/MgO]N multilayers
Investigations on magnetostatic interactions among CoFeB layers with perpendicular anisotropy in [Ta/CoFeB/MgO]N multilayers
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DOI：
10.1063/1.4868924
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发表时间：
2014-03
影响因子：
3.2
通讯作者：
L. Hao;Jiangwei Cao;Mingfeng Liu;H. Dang;T. Jin;Y. Wang;F. Wei;D. Wei
中科院分区：
文献类型：
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作者：
L. Hao;Jiangwei Cao;Mingfeng Liu;H. Dang;T. Jin;Y. Wang;F. Wei;D. Wei
通过测量线圈、磁畴和一个简单的模型研究了[Ta/CoFeB/MgO]N多层膜中具有垂直各向异性的CoFeB层间的静磁相互作用。随着重复次数N的增加或相邻CoFeB层之间的分离厚度d的减小，CoFeB层之间较高的静磁相互作用导致领结形垂直环和剩磁状态下磁畴尺寸的缩小。测量的蝴蝶结形垂直线圈的成核场Hn可以用一个简单的理论模型来解释，该模型包括具有一定畴尺寸的CoFeB层之间的层内和层间静磁相互作用。
The magnetostatic interactions among CoFeB layers with perpendicular anisotropy are studied in [Ta/CoFeB/MgO]N multilayers by measured loops, magnetic domains, and a simple model. With increasing repeat number N or decreasing separation thickness d between adjacent CoFeB layers, higher magnetostatic interaction among CoFeB layers results in bow-tie shape perpendicular loops and shrinking of domain size at remanence state. The measured nucleation field Hn of bow-tie shape perpendicular loops can be explained by a simple theoretical model including the intralayer and interlayer magnetostatic interactions among CoFeB layers with a certain domain size.