Spin Seebeck effect in a simple ferromagnet near Tc: A Ginzburg-Landau approach

TL;DR

This paper uses a Ginzburg-Landau model to analytically study the spin Seebeck effect near the Curie temperature in simple ferromagnets, confirming its proportionality to magnetization and suggesting experimental tests.

Contribution

It provides an analytical Ginzburg-Landau framework for understanding the spin Seebeck effect near Tc, complementing previous numerical studies.

Findings

Spin Seebeck effect is proportional to magnetization near Tc.

Analytical results align with previous numerical findings.

Proposes experimental verification using EuO/Pt or EuS/Pt systems.

Abstract

A time-dependent Ginzburg-Landau theory is used to examine the longitudinal spin Seebeck effect in a simple ferromagnet in the vicinity of the Curie temperature Tc. It is shown analytically that the spin Seebeck effect is proportional to the magnetization near Tc, whose result is in line with the previous numerical finding. It is argued that the present result can be tested experimentally using a simple magnetic system such as EuO/Pt or EuS/Pt.