Crossover behavior of the anomalous hall effect and anomalous nernst effect in itinerant ferromagnets
Crossover behavior of the anomalous hall effect and anomalous nernst effect in itinerant ferromagnets
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DOI：
10.1103/physrevlett.99.086602
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发表时间：
2007-08-24
影响因子：
8.6
通讯作者：
Tokura, Y.
中科院分区：
文献类型：
--
作者：
Miyasato, T.;Abe, N.;Tokura, Y.
反常霍尔效应 (AHE) 和反常能斯特效应 (ANE) 在各种铁磁金属中进行了实验研究，包括纯过渡金属、氧化物和硫属化物，其电阻率范围超过 5 个数量级。对于这些铁磁体，横向电导率 sigma(xy) 与纵向电导率 sigma(xx) 表现出具有三种不同状态的交叉行为，这与最近的内在和外在 AHE 统一理论定性一致。我们还发现 ANE 的横向珀耳帖系数 alpha(xy) 遵循莫特规则。这些结果为 AHE 和 ANE 的一个争论了几十年的问题提供了连贯的半定量理解。
The anomalous Hall effect (AHE) and anomalous Nernst effect (ANE) are experimentally investigated in a variety of ferromagnetic metals including pure transition metals, oxides, and chalcogenides, whose resistivities range over 5 orders of magnitude. For these ferromagnets, the transverse conductivity sigma(xy) versus the longitudinal conductivity sigma(xx) shows a crossover behavior with three distinct regimes in accordance qualitatively with a recent unified theory of the intrinsic and extrinsic AHE. We also found that the transverse Peltier coefficient alpha(xy) for the ANE obeys the Mott rule. These results offer a coherent and semiquantitative understanding of the AHE and ANE to an issue of controversy for many decades.