Spin convertance at magnetic interfaces

TL;DR

This paper introduces the concept of spin convertance to quantify the mutual conversion between electron spin current and magnon current at magnetic interfaces, predicting charge and spin drag effects in layered structures.

Contribution

It defines a new quantitative measure, spin convertance, for spin-magnon conversion at interfaces, advancing understanding of spin transport phenomena.

Findings

Predicts charge and spin drag effects across magnetic insulator layers

Defines a quantitative measure for spin-magnon conversion

Analyzes layered magnetic structures for spin transport

Abstract

The exchange interaction between the conduction electrons and magnetic moments at magnetic interface leads to mutual conversion between electron spin current and magnon current. We introduce a concept of spin convertance which quantitatively measures the magnon current induced by electron spin accumulation and the spin current created by magnon accumulation at the interface. We predict the phenomena on charge and spin drag across a magnetic insulator spacer for several layered structures.