TY - JOUR
T1 - Large perpendicular magnetic anisotropy in epitaxial Fe/MgAl2O4(001) heterostructures
AU - Xiang, Qingyi
AU - Mandal, Ruma
AU - Sukegawa, Hiroaki
AU - Takahashi, Yukiko K.
AU - Mitani, Seiji
N1 - Funding Information:
Acknowledgments This study was partially supported by the ImPACT program of the Council for Science, Technology and Innovation (Cabinet Office, Government of Japan) and JSPS KAKENHI Grant Number 16H06332. Q.X. acknowledges the National Institute for Materials Science for providing a NIMS Junior Research Assistantship.
Publisher Copyright:
© 2018 The Japan Society of Applied Physics.
PY - 2018/6
Y1 - 2018/6
N2 - We investigated the perpendicular magnetic anisotropy (PMA) and related properties of epitaxial Fe (0.7 nm)/MgAl2O4(001) heterostructures prepared by electron beam evaporation. Using an optimized structure, we obtained a large PMA energy of ∼1MJ/m3 at room temperature, which is comparable to that in ultrathin-Fe/MgO(001) heterostructures. Both the PMA energy and saturation magnetization showed a weak temperature dependence, ensuring a wide working temperature range in applications. The effective magnetic damping constant of the 0.7nm Fe layer was found to be ∼0.02 using the time-resolved magneto-optical Kerr effect. This study demonstrated the suitability of the Fe/MgAl2O4 heterostructure for use in perpendicular magnetic tunnel junctions, as well as good agreement with theoretical predictions.
AB - We investigated the perpendicular magnetic anisotropy (PMA) and related properties of epitaxial Fe (0.7 nm)/MgAl2O4(001) heterostructures prepared by electron beam evaporation. Using an optimized structure, we obtained a large PMA energy of ∼1MJ/m3 at room temperature, which is comparable to that in ultrathin-Fe/MgO(001) heterostructures. Both the PMA energy and saturation magnetization showed a weak temperature dependence, ensuring a wide working temperature range in applications. The effective magnetic damping constant of the 0.7nm Fe layer was found to be ∼0.02 using the time-resolved magneto-optical Kerr effect. This study demonstrated the suitability of the Fe/MgAl2O4 heterostructure for use in perpendicular magnetic tunnel junctions, as well as good agreement with theoretical predictions.
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U2 - 10.7567/APEX.11.063008
DO - 10.7567/APEX.11.063008
M3 - Article
AN - SCOPUS:85047951018
SN - 1882-0778
VL - 11
JO - Applied Physics Express
JF - Applied Physics Express
IS - 6
M1 - 063008
ER -