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arXiv · 1505.07662

Determining Spin Polarization of Seebeck Coefficients via Anomalous Nernst Effect

C. Fang·C. H. Wan·Z. H. Yuan·H. Wu·Q. T. Zhang·L. B. Mo·X. Zhang·X. F. Han
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Abstract

Recently, Seebeck coefficients of ferromagnetic conductors are found to be spin-dependent. However straightforward method of accurately determining its spin polarization is still to be developed. Here, we have derived a linear dependence of anomalous Nernst coefficient on anomalous Hall angle with scaling factor related to spin polarization of Seebeck coefficient, which has been experimentally verified in [Co/Pt]n superlattices. Based on the dependence, we have also evaluated spin polarization of Seebeck coefficient of some ferromagnetic conductors. Besides, we have also found a new mechanism to generate pure spin current from temperature gradient in ferromagnetic/nonmagnetic hybrid system, which could improve efficiency from thermal energy to spin current.

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C. Fang, C. H. Wan, Z. H. Yuan, H. Wu, Q. T. Zhang, L. B. Mo, X. Zhang, X. F. Han. 2015-05-28. Determining Spin Polarization of Seebeck Coefficients via Anomalous Nernst Effect. https://arxiv.org/abs/1505.07662

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