Contributions of Co and Fe orbitals to perpendicular magnetic anisotropy of MgO/CoFeB bilayers with Ta, W, IrMn, and Ti underlayers

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We study the perpendicular magnetic anisotropy (PMA) of the CoFeB/MgO bilayers in contact with W, Ta, IrMn, and Ti, which have been suggested for use as the spin-orbit-torque-related underlayers. The saturation magnetization of CoFeB depends on the underlayer material used owing to the formation of a dead layer that affects the PMA strength of each film. The X-ray magnetic circular dichroism measurement reveals that interfacial intermixing suppresses only the perpendicular orbital moment of Fe, whereas it simultaneously suppresses both the perpendicular and in-plane orbital moments of Co. (C) 2017 The Japan Society of Applied Physics
Publisher
IOP PUBLISHING LTD
Issue Date
2017-07
Language
English
Article Type
Article
Keywords

CIRCULAR-DICHROISM; SPIN-TRANSFER; TORQUE

Citation

APPLIED PHYSICS EXPRESS, v.10, no.7

ISSN
1882-0778
DOI
10.7567/APEX.10.073006
URI
http://hdl.handle.net/10203/225093
Appears in Collection
PH-Journal Papers(저널논문)MS-Journal Papers(저널논문)
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