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Title: Nonlinear strain dependence of magnetic anisotropy in CoFe{sub 2}O{sub 4} films on MgO(001) substrates

CoFe{sub 2}O{sub 4} films were deposited on MgO(001) substrates using pulsed laser deposition with various laser energy densities. We found that the CoFe{sub 2}O{sub 4} films were grown in the (001) orientation and that the lattice constant of the CoFe{sub 2}O{sub 4} films was dependent on the laser energy densities. Perpendicular magnetic anisotropy (PMA) was observed, but the lattice strain dependence was not consistent with the phenomenological model in which the PMA is in proportion to the lattice strain. The lattice strain dependence of PMA was compared with an electron theory in which the spin-orbit interaction and the tetragonal crystal field in the electronic state of a single Co ion are considered. The experimental result does not contradict with the calculation, which shows that the magnetic anisotropy is not proportional to the lattice strain and asymmetric in respect to negative and positive lattice strain.
Authors:
; ; ;  [1] ;  [2]
  1. Department of Engineering Physics, Electronics and Mechanics, Nagoya Institute of Technology, Nagoya, Aichi 466-8555 (Japan)
  2. Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-0006 (Japan)
Publication Date:
OSTI Identifier:
22273948
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANISOTROPY; COBALT IONS; COBALT OXIDES; COMPARATIVE EVALUATIONS; CRYSTAL FIELD; CRYSTAL STRUCTURE; ELECTRONS; ENERGY BEAM DEPOSITION; ENERGY DENSITY; FERRITES; LASER RADIATION; LATTICE PARAMETERS; L-S COUPLING; MAGNESIUM OXIDES; NONLINEAR PROBLEMS; PULSED IRRADIATION; STRAINS; SUBSTRATES; THIN FILMS