TY - JOUR
T1 - Large lattice mismatch induced perpendicular magnetic anisotropy and perpendicular exchange bias in CoPt/FeMn bilayer films
AU - Pan, Chun Jiao
AU - Gao, Teng Hua
AU - Itogawa, Nobuhide
AU - Harumoto, Takashi
AU - Zhang, Zheng Jun
AU - Nakamura, Yoshio
AU - Shi, Ji
N1 - Publisher Copyright:
© 2019, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2019/11/1
Y1 - 2019/11/1
N2 - Perpendicular magnetic anisotropy and perpendicular exchange bias of CoPt/FeMn bilayers fabricated by dc magnetron sputtering were investigated in this work. Magnetic anisotropy, showing strong dependence on thickness of CoPt layer, changes from perpendicular magnetic anisotropy (PMA) into in-plane magnetic anisotropy when CoPt layer is thicker than 4.5 nm. The evolution of internal stress with thickness, from tensile to compressive, has been analyzed by sin2ψ method using an equal biaxial stress model. Distinctive perpendicular exchange bias (PEB) has been successfully established due to PMA of CoPt and out-of-plane spin component of 3Q-spin-structured FeMn. FeMn thickness dependence of exchange bias field has been systematically investigated.
AB - Perpendicular magnetic anisotropy and perpendicular exchange bias of CoPt/FeMn bilayers fabricated by dc magnetron sputtering were investigated in this work. Magnetic anisotropy, showing strong dependence on thickness of CoPt layer, changes from perpendicular magnetic anisotropy (PMA) into in-plane magnetic anisotropy when CoPt layer is thicker than 4.5 nm. The evolution of internal stress with thickness, from tensile to compressive, has been analyzed by sin2ψ method using an equal biaxial stress model. Distinctive perpendicular exchange bias (PEB) has been successfully established due to PMA of CoPt and out-of-plane spin component of 3Q-spin-structured FeMn. FeMn thickness dependence of exchange bias field has been systematically investigated.
KW - X-ray technique
KW - magnetic materials
KW - perpendicular exchange bias
KW - perpendicular magnetic anisotropy
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U2 - 10.1007/s11431-019-1433-0
DO - 10.1007/s11431-019-1433-0
M3 - Article
AN - SCOPUS:85074011951
SN - 1674-7321
VL - 62
SP - 2009
EP - 2013
JO - Science China Technological Sciences
JF - Science China Technological Sciences
IS - 11
ER -