Manipulation of magnetization in GaMnAs films by spin-orbit-induced magnetic fields
- Authors
- Lee, Sangyeop; Yoo, Taehee; Bac, Seul-Ki; Choi, Seonghoon; Lee, Hakjoon; Lee, Sanghoon; Liu, X.; Furdyna, J. K.; Dobrowolska, M.
- Issue Date
- 5월-2017
- Publisher
- ELSEVIER
- Keywords
- Spin orbit induced field; Planar Hall resistance; Ferromagnetic semiconductors
- Citation
- CURRENT APPLIED PHYSICS, v.17, no.5, pp.801 - 805
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- CURRENT APPLIED PHYSICS
- Volume
- 17
- Number
- 5
- Start Page
- 801
- End Page
- 805
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/83548
- DOI
- 10.1016/j.cap.2017.03.004
- ISSN
- 1567-1739
- Abstract
- We have investigated the effect of spin-orbit-induced (SOI) magnetic fields on magnetization switching in GaMnAs films. The sign of such SOI fields depends on the direction of the current flowing in the film, thus providing a handle for electrically manipulating magnetization in ferromagnetic GaMnAs films. Specifically, when an applied magnetic field is swept along the current direction, magnetization reversal occurs via rotations in opposite sense (i.e., clockwise (CW) or counterclockwise (CCW)) depending on the sign of the current, thus leading to opposite signs of the planar Hall resistance (PHR) measured on the film. The effect of SOI fields also manifests itself through hysteretic behavior of PHR for two opposite currents as a fixed magnetic field is rotated in the film plane. The width of the resulting hysteresis between two current directions then allows us to estimate the magnitude of the SOI field at current density of 1.0 x 10(5) A/cm(2) as similar to 1.2 Oe in our GaMnAs film. Such switching of magnetization between two magnetic easy axes induced by switching the sign of an applied current provides a means of electronically controlling the value of film resistance (in this case of PHR), a process that can be exploited in spintronic devices. (C) 2017 Elsevier B.V. All rights reserved.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Science > Department of Physics > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.