Magnetization reversal by injection and transfer of spin: experiments and theory

TL;DR

This paper explores the phenomenon of reversing ferromagnet magnetization through spin transfer from current, combining experimental results on Co/Cu/Co pillars with a theoretical model for current-induced torque.

Contribution

It introduces a new model for calculating current-induced torque and interprets experimental data on magnetization reversal in trilayered pillars.

Findings

Successful demonstration of current-induced magnetization reversal

Development of a theoretical model for spin transfer torque

Experimental validation of the model's predictions

Abstract

Reversing the magnetization of a ferromagnet by spin transfer from a current, rather than by applying a magnetic field, is the central idea of an extensive current research. After a review of our experiments of current-induced magnetization reversal in Co/Cu/Co trilayered pillars, we present the model we have worked out for the calculation of the current-induced torque and the interpretation of the experiments.