Training Effect and Hysteretic Behaviour of Angular Dependence of Exchange Bias in Co/IrMn Bilayers

Training Effect and Hysteretic Behaviour of Angular Dependence of Exchange Bias in Co/IrMn Bilayers
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Co/IrMn 双层交换偏压角度依赖性的训练效应和迟滞行为

DOI:
10.1088/0256-307x/26/4/047501
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发表时间:
2009-04
影响因子:
3.5
通讯作者:
Zhang Wei
Zhang Wei
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Bai Xiao-Jun;Du Jun;Zhang Jing;You Biao;Hu An;Zhang Wei

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在一系列Co/IrMn双层膜中,研究了IrMn层厚度tIrMn变化对交换偏置角度依赖性的训练效应和滞后行为的影响.当tIrMn很小时,两者都可以忽略不计。然后,它们随着tIrMn的增加而急剧增加,然后在几乎相同的tIrMn值处达到最大值。最后,当tIrMn进一步增加时,它们都降低。根据热激活模型,这些现象的出现是由于反铁磁自旋取向的不可逆变化。
The training effect and the hysteresis behaviour of the angular dependence of exchange bias are extensively investigated upon the variation of the IrMn layer thickness tIrMn in a series of Co/IrMn bilayers. When tIrMn is very small, both of them are negligible. Then they increase very sharply with increasing tIrMn and then reach maxima at almost the same value of tIrMn. Finally they both decrease when tIrMn is further increased. The similar variation trends suggest that these phenomena arise from irreversible change of antiferromagnet spin orientations, according to the thermal activation model.
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