TY - JOUR
T1 - Contributions of Co and Fe orbitals to perpendicular magnetic anisotropy of MgO/CoFeB bilayers with Ta, W, IrMn, and Ti underlayers
AU - Kim, Sanghoon
AU - Baek, Seungheon Chris
AU - Ishibashi, Mio
AU - Yamada, Kihiro
AU - Taniguchi, Takuya
AU - Okuno, Takaya
AU - Kotani, Yoshinori
AU - Nakamura, Tetsuya
AU - Kim, Kab Jin
AU - Moriyama, Takahiro
AU - Park, Byong Guk
AU - Ono, Teruo
N1 - Funding Information:
This work was partly supported by JSPS KAKENHI Grant Numbers 15H05702, 26870300, 26870304, 26103002, and 25220604, the Collaborative Research Program of the Institute for Chemical Research, Kyoto University, the R&D project for ICT Key Technology of MEXT from the Japan Society for the Promotion of Science (JSPS), and the Cooperative Research Project Program of the Research Institute of Electrical Communication, Tohoku University. This work has also been performed with the approval of the SPring-8 Program Advisory Committee (Proposal Numbers 2016A0117 and 2016B0117). S.K. was supported by a grant from overseas researchers under Postdoctoral Fellowship of JSPS (Grant Number 2604316). B.-G.P. acknowledges a financial support from the National Research Foundation of Korea (NRF-2015M3D1A1070465). K.-J.K was supported by National Research Foundation of Korea (NRF-2016R1A5A1008184).
Publisher Copyright:
© 2017 The Japan Society of Applied Physics.
PY - 2017/7
Y1 - 2017/7
N2 - 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.
AB - 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.
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U2 - 10.7567/APEX.10.073006
DO - 10.7567/APEX.10.073006
M3 - Article
AN - SCOPUS:85021843381
SN - 1882-0778
VL - 10
JO - Applied Physics Express
JF - Applied Physics Express
IS - 7
M1 - 073006
ER -