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X-ray scattering study on the electric field-induced interfacial magnetic anisotropy modulation at CoFeB / MgO interfaces

Authors
Song, Kyung MeeKim, Dong-OkKim, Jae-SungLee, Dong RyeolChoi, Jun Woo
Issue Date
Nov-2018
Publisher
ELSEVIER SCIENCE BV
Keywords
Spintronics; Magnetic anisotropy; X-ray scattering; Electric field control of magnetism
Citation
CURRENT APPLIED PHYSICS, v.18, no.11, pp.1212 - 1217
Journal Title
CURRENT APPLIED PHYSICS
Volume
18
Number
11
Start Page
1212
End Page
1217
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/4198
DOI
10.1016/j.cap.2018.05.003
ISSN
1567-1739
Abstract
The electric field-induced modifications of magnetic anisotropy in CoFeB/MgO systems are studied using X-ray resonant magnetic scattering and magneto-optical Kerr effect. Voltage dependent changes of the magnetic anisotropy of -12.7 fJ/Vm and - 8.32 fJ/Vm are observed for Ta/CoFeB/MgO and Hf/CoFeB/MgO systems, respectively. This implies that the interfacial perpendicular magnetic anisotropy is reduced (enhanced) when electron density is increased (decreased). X-ray resonant magnetic scattering measurements reveal that the small in-plane magnetic component of the remanent state of CoFeB/MgO systems with weak magnetic anisotropy changes depending on the applied voltage leading to modification of the magnetic anisotropy at the CoFeB/MgO interface.
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