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.
@article{arxiv.1505.07662,
title = {Determining Spin Polarization of Seebeck Coefficients via Anomalous Nernst Effect},
author = {C. Fang and C. H. Wan and Z. H. Yuan and H. Wu and Q. T. Zhang and L. B. Mo and X. Zhang and X. F. Han},
journal= {arXiv preprint arXiv:1505.07662},
year = {2015}
}
Comments
5 pages and 4 figures in maintext and a supplementary material with 4 supplementary figures