Intrinsic Spin Seebeck Effect in Au/YIG
D. Qu, S. Y. Huang, Jun Hu, Ruqian Wu, and C. L. Chien
TL;DR
This paper demonstrates that Au/YIG interfaces enable the measurement of the intrinsic spin Seebeck effect without magnetic proximity effects, revealing a smaller effect compared to Pt/YIG, supported by experimental and computational evidence.
Contribution
It introduces Au/YIG as a superior platform for intrinsic spin Seebeck effect measurements, avoiding magnetic proximity complications present in Pt/YIG.
Findings
Au/YIG shows negligible magnetic proximity effects.
The spin Seebeck effect in Au/YIG is significantly smaller than in Pt/YIG.
Experimental results align with density-functional calculations.
Abstract
The acute magnetic proximity effects in Pt/YIG compromise the suitability of Pt as a spin current detector. We show that Au/YIG, with no anomalous Hall effect and a negligible magnetoresistance, allows the measurements of the intrinsic spin Seebeck effect with a magnitude much smaller than that in Pt/YIG. The experiment results are consistent with the spin-polarized density-functional calculations for Pt with a sizable and Au with a negligible magnetic moment near the interface with YIG.
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