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

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number214428
JournalPhysical Review B
Volume98
Issue number21
DOIs
Publication statusPublished - 2018 Dec 14

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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