論文

査読有り
2018年6月1日

Large perpendicular magnetic anisotropy in epitaxial Fe/MgAl2O4(001) heterostructures

Applied Physics Express
  • Qingyi Xiang
  • ,
  • Ruma Mandal
  • ,
  • Hiroaki Sukegawa
  • ,
  • Yukiko K. Takahashi
  • ,
  • Seiji Mitani

11
6
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.7567/APEX.11.063008
出版者・発行元
Japan Society of Applied Physics

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.

リンク情報
DOI
https://doi.org/10.7567/APEX.11.063008
URL
http://orcid.org/0000-0002-4034-7848

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