Anomalous exchange bias in Gd/Cr bilayer and Cr/Gd/Cr trilayers

Z.W. Jiao; P.Z. Si; W.D. Jiang

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Anomalous exchange bias in Gd/Cr bilayer and Cr/Gd/Cr trilayers

机译：Gd / Cr双层和Cr / Gd / Cr三层中的异常交换偏向

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Exchange bias has been observed in Gd/Cr bilayers and Cr/Gd/Cr trilayers systems in which the Curie temperature (7c) of ferromagnetic Gd is less than the Neel temperature (T_N) of antiferromagnetic Cr. The exchange bias field HE and coercivity He of the samples exhibit anomalous temperature dependence behavior in comparison with the conventional ferromagnet/antiferromagnet bilayers with T_C>T_N. AS temperature increases, H_E increases monotonically until T_C, whereas H_C drops first and then goes up; finally, it disappears at T_C, which is attributed to the noncollinear interfacial exchange coupling between Gd and Cr. The results show that the exchange bias may exist in the AFM/FM bilayers regardless of the condition of T_C>T_N.

机译：在Gd / Cr双层和Cr / Gd / Cr三层系统中观察到交换偏压，其中铁磁性Gd的居里温度（7c）小于反铁磁性Cr的Neel温度（T_N）。与具有T_C> T_N的常规铁磁体/反磁体双层相比，样品的交换偏置场HE和矫顽力He表现出反常的温度依赖性行为。随着温度升高，H_E单调升高直到T_C，而H_C先下降然后上升;最后，它在T_C消失，这归因于Gd和Cr之间的非共线界面交换耦合。结果表明，无论T_C> T_N的条件如何，交换偏压都可能存在于AFM / FM双层中。

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《Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics》 |2008年第2期|共4页
作者
Z.W. Jiao; P.Z. Si; W.D. Jiang;
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Rare-earth alloys and compounds; Exchange and superexchange; Magnetization; Magnetic measurement;

机译：稀土合金及化合物;交换与交换;磁化;磁测量;

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Anomalous exchange bias in Gd/Cr bilayer and Cr/Gd/Cr trilayers

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