Temperature-dependent properties of CoFeB/MgO thin films: Experiments versus simulations

H. Sato, P. Chureemart, F. Matsukura, R. W. Chantrell, H. Ohno, R. F.L. Evans

研究成果: Article査読

25 被引用数 (Scopus)

抄録

CoFeB/MgO heterostructures are a promising candidate for an integral component of spintronic devices due to their high magnetic anisotropy, low Gilbert damping, and excellent magnetoresistive properties. Here, we present experimental measurements and atomistic simulations of the temperature and CoFeB thickness dependence of spontaneous magnetization and magnetic anisotropy in CoFeB/MgO ultrathin films. We find that the thermal fluctuations are different between the bulk and interface magnetizations, and that the interfacial anisotropy originates from a two-site anisotropic exchange interaction. These effects lead to a complex temperature and thickness dependence of the magnetic properties critical to device operation and stability at elevated temperatures.

本文言語English
論文番号214428
ジャーナルPhysical Review B
98
21
DOI
出版ステータスPublished - 2018 12 14

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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