Dissemin is shutting down on January 1st, 2025

Published in

Nature Research, Nature Communications, 1(9), 2018

DOI: 10.1038/s41467-018-06223-z

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A spin torque meter with magnetic facet domains

This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Postprint: archiving forbidden
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Data provided by SHERPA/RoMEO

Abstract

AbstractCurrent-induced magnetic domain wall (DW) motion is an important operating principle of spintronic devices. Injected current generates spin torques (STs) on the DWs in two ways. One is the spin transfer from magnetic domains to the walls by the current flowing in the magnet. Current flow in attached heavy metals also generates another ST because of the spin-Hall effect. Both phenomena explain the wall motions well; therefore, their respective contribution is an important issue. Here, we show the simultaneous measurement of both torques by using magnetic facet domains that form mountain-shaped domains with straight walls. When the STs and the external magnetic field push the walls in opposite directions, the walls should have equilibrium angles to create balanced states. Such angles can be modulated by an additional in-plane magnetic field. Angle measurements distinguish the STs because each torque has a distinct mechanism related to the DW structure.