A spin torque meter with magnetic facet domains.

Abstract:

:Current-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.

journal_name

Nat Commun

journal_title

Nature communications

authors

Moon KW,Kim C,Yoon J,Choi JW,Kim DO,Song KM,Kim D,Chun BS,Hwang C

doi

10.1038/s41467-018-06223-z

subject

Has Abstract

pub_date

2018-09-17 00:00:00

pages

3788

issue

1

issn

2041-1723

pii

10.1038/s41467-018-06223-z

journal_volume

9

pub_type

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