Enhancement of anomalous Nernst effects in metallic multilayers free from proximity-induced magnetism
Enhancement of anomalous Nernst effects in metallic multilayers free from proximity-induced magnetism
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DOI：
10.1103/physrevb.92.094414
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发表时间：
2015-09
影响因子：
3.7
通讯作者：
K. Uchida;T. Kikkawa;T. Seki;T. Oyake;J. Shiomi;Z. Qiu;K. Takanashi;E. Saitoh
中科院分区：
文献类型：
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作者：
K. Uchida;T. Kikkawa;T. Seki;T. Oyake;J. Shiomi;Z. Qiu;K. Takanashi;E. Saitoh
研究了顺磁性和铁磁性金属交替叠层多层膜的反常能斯特效应。我们发现，ANE的增强通过增加顺磁体/铁磁体界面的数量，并保持膜的总厚度不变，并且即使在没有磁性邻近效应的情况下也会出现增强;不仅在Pt/Fe多层膜中观察到类似的行为，而且在Au/Fe和Cu/Fe多层膜中也观察到类似的行为。这种普遍的增强ANE在金属多层膜表明存在非常规的界面诱导的热电转换附着在顺磁体的Fe膜。
The anomalous Nernst effect (ANE) has been investigated in alternately stacked multilayer films comprising paramagnetic and ferromagnetic metals. We found that the ANE is enhanced by increasing the number of the paramagnet/ferromagnet interfaces and keeping the total thickness of the films constant, and that the enhancement appears even in the absence of magnetic proximity effects; similar behavior was observed not only in Pt/Fe multilayers but also in Au/Fe and Cu/Fe multilayers free from proximity ferromagnetism. This universal enhancement of the ANE in metallic multilayers suggests the presence of unconventional interface-induced thermoelectric conversion in the Fe films attached to the paramagnets.