Spin mixing conductance at a well-controlled platinum/yttrium iron garnet interface

TL;DR

This study investigates the spin mixing conductance at a precisely controlled platinum/yttrium iron garnet interface, demonstrating that interface quality significantly enhances spin transfer efficiency, with results aligning closely with theoretical models.

Contribution

It provides the first experimental demonstration that crystal perfection at the Pt/YIG interface leads to high spin mixing conductance, approaching theoretical predictions.

Findings

High spin mixing conductance of 1.3×10^{18} m^{-2} achieved

Crystal perfection enhances interface spin transfer

Results closely match theoretical predictions

Abstract

A platinum (Pt)/yttrium iron garnet (YIG) bilayer system with a well-controlled interface has been developed; spin mixing conductance at the Pt/YIG interface has been studied. Crystal perfection at the interface is experimentally demonstrated to contribute to large spin mixing conductance. The spin mixing conductance is obtained to be $1.3\times10^{18} \rm{m^{-2}}$ at the well-controlled Pt/YIG interface, which is close to a theoretical prediction.