Studies of Effects of Current on Exchange-Bias: A Brief Review

TL;DR

This paper reviews recent experimental studies on how high current densities influence exchange bias at ferromagnetic/antiferromagnetic interfaces, highlighting potential effects on magnetic order and giant magnetoresistance.

Contribution

It provides a concise review of experimental findings related to current-driven effects on exchange bias, building on theoretical predictions by MacDonald and colleagues.

Findings

High current densities can modify AFM magnetic order.

Current-driven effects can influence exchange bias at F/AFM interfaces.

Potential implications for antiferromagnetic giant magnetoresistance.

Abstract

MacDonald and co-workers recently predicted that high current densities could affect the magnetic order of antiferromagnetic (AFM) multilayers, in ways similar to those that occur in ferromagnetic (F) multilayers, and that changes in AFM magnetic order can produce an antiferromagnetic Giant Magnetoresistance (AGMR). Four groups have now studied current-driven effects on exchange bias at F/AFM interfaces. In this paper, we first briefly review the main predictions by MacDonald and co-workers, and then the results of experiments on exchange bias that these predictions stimulated.