Journal
APPLIED PHYSICS EXPRESS
Volume 11, Issue 6, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/APEX.11.063008
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Funding
- ImPACT program of the Council for Science, Technology and Innovation (Cabinet Office, Government of Japan)
- JSPS KAKENHI [16H06332]
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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 MJ/m(3) 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 0.7 nm Fe layer was found to be -41.02 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. (C) 2018 The Japan Society of Applied Physics
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