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Title: Strain relaxation and enhanced perpendicular magnetic anisotropy in BiFeO{sub 3}:CoFe{sub 2}O{sub 4} vertically aligned nanocomposite thin films

Self-assembled BiFeO{sub 3}:CoFe{sub 2}O{sub 4} (BFO:CFO) vertically aligned nanocomposite thin films have been fabricated on SrTiO{sub 3} (001) substrates using pulsed laser deposition. The strain relaxation mechanism between BFO and CFO with a large lattice mismatch has been studied by X-ray diffraction and transmission electron microscopy. The as-prepared nanocomposite films exhibit enhanced perpendicular magnetic anisotropy as the BFO composition increases. Different anisotropy sources have been investigated, suggesting that spin-flop coupling between antiferromagnetic BFO and ferrimagnetic CFO plays a dominant role in enhancing the uniaxial magnetic anisotropy.
Authors:
; ;  [1] ; ; ;  [2] ;  [2] ;  [3] ;  [4] ;  [5] ;  [1] ;  [6]
  1. Department of Materials Science and Engineering, Texas A and M University, College Station, Texas 77843 (United States)
  2. Department of Electrical and Computer Engineering, Texas A and M University, College Station, Texas 77843 (United States)
  3. (CINT), Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  4. Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  5. Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ (United Kingdom)
  6. (United States)
Publication Date:
OSTI Identifier:
22283191
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 6; 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; 77 NANOSCIENCE AND NANOTECHNOLOGY; ANISOTROPY; ANTIFERROMAGNETISM; BISMUTH COMPOUNDS; COBALT OXIDES; COMPOSITE MATERIALS; COUPLING; CRYSTAL DEFECTS; ENERGY BEAM DEPOSITION; FERRIMAGNETISM; FERRITES; LASER RADIATION; NANOSTRUCTURES; PULSED IRRADIATION; RELAXATION; SPIN; STRAINS; STRONTIUM TITANATES; THIN FILMS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION