TY - JOUR
T1 - Giant voltage-controlled magnetic anisotropy effect in a crystallographically strained CoFe system
AU - Kato, Yushi
AU - Yoda, Hiroaki
AU - Saito, Yoshiaki
AU - Oikawa, Soichi
AU - Fujii, Keiko
AU - Yoshiki, Masahiko
AU - Koi, Katsuhiko
AU - Sugiyama, Hideyuki
AU - Ishikawa, Mizue
AU - Inokuchi, Tomoaki
AU - Shimomura, Naoharu
AU - Shimizu, Mariko
AU - Shirotori, Satoshi
AU - Altansargai, Buyandalai
AU - Ohsawa, Yuichi
AU - Ikegami, Kazutaka
AU - Tiwari, Ajay
AU - Kurobe, Atsushi
N1 - Funding Information:
Acknowledgments This work was partly supported by the ImPACT Program of the Council for Science, Technology, and Innovation (Cabinet Office, Government of Japan). The synchrotron radiation experiments were performed at BL16B2 of SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal Nos. 2012A5360 and 2017A5360).
Publisher Copyright:
© 2018 The Japan Society of Applied Physics.
PY - 2018/5
Y1 - 2018/5
N2 - We experimentally demonstrate a giant voltage-controlled magnetic anisotropy (VCMA) coefficient in a crystallographically strained CoFe layer (>15 monolayers in thickness) in a MgO/CoFe/Ir system. We observed a strong applied voltage dependence of saturation field and an asymmetric concave behavior with giant VCMA coefficients of %758 and 1043 fJ V%1 m%1. The result of structural analysis reveals epitaxial growth in MgO/ CoFe/Ir layers and the orientation relationship MgO(001)[110] k CoFe(001)[100] k Ir(001)[110]. The CoFe layer has a bcc structure and a tetragonal distortion due to the lattice mismatch; therefore, the CoFe layer has a large perpendicular magnetic anisotropy.
AB - We experimentally demonstrate a giant voltage-controlled magnetic anisotropy (VCMA) coefficient in a crystallographically strained CoFe layer (>15 monolayers in thickness) in a MgO/CoFe/Ir system. We observed a strong applied voltage dependence of saturation field and an asymmetric concave behavior with giant VCMA coefficients of %758 and 1043 fJ V%1 m%1. The result of structural analysis reveals epitaxial growth in MgO/ CoFe/Ir layers and the orientation relationship MgO(001)[110] k CoFe(001)[100] k Ir(001)[110]. The CoFe layer has a bcc structure and a tetragonal distortion due to the lattice mismatch; therefore, the CoFe layer has a large perpendicular magnetic anisotropy.
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U2 - 10.7567/APEX.11.053007
DO - 10.7567/APEX.11.053007
M3 - Article
AN - SCOPUS:85046550443
SN - 1882-0778
VL - 11
JO - Applied Physics Express
JF - Applied Physics Express
IS - 5
M1 - 053007
ER -