The spin-Seebeck effect (SSE), the spin-voltage generation as a result of a temperature gradient, has recently been observed in ferrimagnetic insulator LaY2Fe5O12 films by means of the inverse spin-Hall effect in Pt films. Here we investigate the SSE using LaY 2Fe5O12/SiO2(Cu)/Pt systems, where the LaY2Fe5O12 and Pt layers are separated by SiO2 (Cu) thin-film barriers. The experimental results show that the SSE signal disappears in the LaY2Fe5O12/ SiO2/Pt system, but the finite signal appears in the LaY 2Fe5O12/Cu/Pt system, indicating that the direct contacts between the LaY2Fe5O12 and normal metals is necessary for generating the SSE signal.
ASJC Scopus subject areas
- Physics and Astronomy(all)