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arXiv · 1701.05320

Separation of inverse spin Hall effect and anomalous Nernst effect in ferromagnetic metals

Hao Wu·Xiao Wang·Li Huang·Jianying Qin·Chi Fang·Xuan Zhang·Caihua Wan·Xiufeng Han
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Abstract

Inverse spin Hall effect (ISHE) in ferromagnetic metals (FM) can also be used to detect the spin current generated by longitudinal spin Seebeck effect in a ferromagnetic insulator YIG. However, anomalous Nernst effect(ANE) in FM itself always mixes in the thermal voltage. In this work, the exchange bias structure (NiFe/IrMn)is employed to separate these two effects. The exchange bias structure provides a shift field to NiFe, which can separate the magnetization of NiFe from that of YIG in M-H loops. As a result, the ISHE related to magnetization of YIG and the ANE related to the magnetization of NiFe can be separated as well. By comparison with Pt, a relative spin Hall angle of NiFe (0.87) is obtained, which results from the partially filled 3d orbits and the ferromagnetic order. This work puts forward a practical method to use the ISHE in ferromagnetic metals towards future spintronic applications.

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Hao Wu, Xiao Wang, Li Huang, Jianying Qin, Chi Fang, Xuan Zhang, Caihua Wan, Xiufeng Han. 2017-01-19. Separation of inverse spin Hall effect and anomalous Nernst effect in ferromagnetic metals. https://doi.org/10.1016/j.jmmm.2017.05.031

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