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Title: Electron theory of perpendicular magnetic anisotropy of Co-ferrite thin films

We develop an electron theory for the t{sub 2g} electrons of Co{sup 2+} ions to clarify the perpendicular magnetic anisotropy (PMA) mechanism of Co-ferrite thin films by considering the spin-orbit interaction (SOI) and crystal-field (CF) potentials induced by the local symmetry around the Co ions and the global tetragonal symmetry of the film. Uniaxial and in-plane MA constants K{sub u} and K{sub 1} at 0 K, respectively, are calculated for various values of SOI and CF. We show that reasonable parameter values explain the observed PMA and that the orbital moment for the in-plane magnetization reduces to nearly half of that of the out-of-plane magnetization.
Authors:
; ;  [1] ;  [1] ;  [2] ;  [3]
  1. Institute of Applied Physics, University of Tsukuba, Tsukuba 305-8573 (Japan)
  2. (Japan)
  3. Department of Pure and Applied Physics, Kansai University, Suita 564-8680 (Japan)
Publication Date:
OSTI Identifier:
22251409
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 4; Journal Issue: 2; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANISOTROPY; COBALT IONS; CRYSTAL FIELD; ELECTRONS; FERRITE; FERRITES; L-S COUPLING; MAGNETIZATION; THIN FILMS