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arXiv · 1505.06911

Observation of pure inverse spin Hall effect in ferromagnetic metals by FM/AFM exchange bias structures

H. Wu·C. H. Wan·Z. H. Yuan·X. Zhang·J. Jiang·Q. T. Zhang·Z. C. Wen·X. F. Han
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Abstract

We report that the spin current generated by spin Seebeck effect (SSE) in yttrium iron garnet (YIG) can be detected by a ferromagnetic metal (NiFe). By using the FM/AFM exchange bias structure (NiFe/IrMn), inverse spin Hall effect (ISHE) and planar Nernst effect (PNE) of NiFe can be unambiguously separated, allowing us to observe a pure ISHE signal. After eliminating the in plane temperature gradient in NiFe, we can even observe a pure ISHE signal without PNE from NiFe itself. It is worth noting that a large spin Hall angle (0.098) of NiFe is obtained, which is comparable with Pt. This work provides a kind of FM/AFM exchange bias structures to detect the spin current by charge signals, and highlights ISHE in ferromagnetic metals can be used in spintronic research and applications.

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H. Wu, C. H. Wan, Z. H. Yuan, X. Zhang, J. Jiang, Q. T. Zhang, Z. C. Wen, X. F. Han. 2015-05-26. Observation of pure inverse spin Hall effect in ferromagnetic metals by FM/AFM exchange bias structures. https://arxiv.org/abs/1505.06911

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