  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.
