Coercivity and exchange bias of ferromagnetic/antiferromagnetic multilayers
Coercivity and exchange bias of ferromagnetic/antiferromagnetic multilayers
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DOI：
10.1103/physrevb.71.064413
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发表时间：
2005-02-01
影响因子：
3.7
通讯作者：
Nowak, U
中科院分区：
文献类型：
--
作者：
Scholten, G;Usadel, KD;Nowak, U
对于由铁磁层交换耦合到具有补偿界面的反铁磁层组成的模型系统，进行了详细的平均场型计算。计算了矫顽场和交换偏置场。对于矫顽场，一个相当广泛的增强周围的Neel温度T-N的反铁磁层被发现，无论反铁磁层是否是结构上的无序或没有，而交换偏置只发现无序系统。我们发现，所观察到的T-N附近的双折射率的增强也发现实验和交换偏置的发生是不同的起源。
For a model system consisting of a ferromagnetic layer exchange coupled to an antiferromagnetic layer with a compensated interface, detailed mean-field-type calculations are performed. Both the coercive field and the exchange bias field are calculated. For the coercive field, a rather broad enhancement around the Neel temperature T-N of the antiferromagnetic layer is found irrespective of whether the antiferromagnetic layer is structurally disordered or not, while exchange bias is only found for disordered systems. We show that the observed enhancement of the coercivity around T-N also found experimentally and the occurrence of exchange bias are of different origin.