Spin transfer and spin-orbit torques in in-plane magnetized (Ga,Mn)As tracks
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
Current-driven domain wall motion is investigated experimentally in in-plane magnetized (Ga,Mn)As tracks. The wall dynamics is found to differ in two important ways with respect to perpendicularly magnetized (Ga,Mn)As: the wall mobilities are up to ten times higher and the walls move in the same direction as the hole current. We demonstrate that these observations cannot be explained by spin-orbit field torques (Rashba and Dresselhaus types) but are consistent with nonadiabatic spin transfer torque enhanced by the strong spin-orbit coupling of (Ga,Mn)As. This mechanism opens the way to domain wall motion driven by bulk rather than interfacial spin-orbit coupling as in ultrathin ferromagnet/heavy metal multilayers.
Date Issued
2017-02-16
Date Acceptance
2017-02-01
Citation
Physical Review B, 2017, 95 (5), pp.054422-1-054422-10
ISSN
2469-9950
Publisher
American Physical Society (APS)
Start Page
054422-1
End Page
054422-10
Journal / Book Title
Physical Review B
Volume
95
Issue
5
Copyright Statement
©2017 American Physical Society
Identifier
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.054422
Publication Status
Published
Article Number
054422
Date Publish Online
2017-02-16