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Title: Magnetic anisotropy in composite CoFe{sub 2}O{sub 4}-BiFeO{sub 3} ultrathin films grown by pulsed-electron deposition

Abstract

Many works have demonstrated perpendicular magnetic anisotropy in CoFe{sub 2}O{sub 4}-BiFeO{sub 3} (CFO-BFO) composites, which is commonly believed to originate from out-of-plane compressive strain in the CFO pillars due to the lattice mismatch with the BFO matrix. Others have shown that the pillar-matrix interface in similar NiFe{sub 2}O{sub 4}-BFO composites is fully relaxed. To study the origin of the magnetic anisotropy, composite films were grown on SrTiO{sub 3} with thicknesses ranging from 13 to 150 nm via pulsed electron deposition. In-plane compressive strain in the pillars is found for thinner samples, which induces in-plane magnetoelastic anisotropy. A model for the origin of this previously unreported strain is proposed and the results are contrasted with the thicker composite films found in the literature.

Authors:
; ;  [1];  [2];  [1]
  1. Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904 (United States)
  2. Guilford College, Greensboro, North Carolina 27410 (United States)
Publication Date:
OSTI Identifier:
22038930
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 111; Journal Issue: 7; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANISOTROPY; BISMUTH COMPOUNDS; COBALT OXIDES; COMPOSITE MATERIALS; CRYSTAL DEFECTS; CRYSTAL GROWTH; DEFORMATION; ELECTRON BEAMS; ENERGY BEAM DEPOSITION; INTERFACES; IRON OXIDES; MAGNETISM; MATRIX MATERIALS; NICKEL COMPOUNDS; STRAINS; STRONTIUM TITANATES; THIN FILMS

Citation Formats

Comes, Ryan, Liu, Hongxue, Lu, Jiwei, Khokhlov, Mikhail, Wolf, Stuart A, and Department of Physics, University of Virginia, Charlottesville, Virginia 22904. Magnetic anisotropy in composite CoFe{sub 2}O{sub 4}-BiFeO{sub 3} ultrathin films grown by pulsed-electron deposition. United States: N. p., 2012. Web. doi:10.1063/1.3676413.
Comes, Ryan, Liu, Hongxue, Lu, Jiwei, Khokhlov, Mikhail, Wolf, Stuart A, & Department of Physics, University of Virginia, Charlottesville, Virginia 22904. Magnetic anisotropy in composite CoFe{sub 2}O{sub 4}-BiFeO{sub 3} ultrathin films grown by pulsed-electron deposition. United States. doi:10.1063/1.3676413.
Comes, Ryan, Liu, Hongxue, Lu, Jiwei, Khokhlov, Mikhail, Wolf, Stuart A, and Department of Physics, University of Virginia, Charlottesville, Virginia 22904. Sun . "Magnetic anisotropy in composite CoFe{sub 2}O{sub 4}-BiFeO{sub 3} ultrathin films grown by pulsed-electron deposition". United States. doi:10.1063/1.3676413.
@article{osti_22038930,
title = {Magnetic anisotropy in composite CoFe{sub 2}O{sub 4}-BiFeO{sub 3} ultrathin films grown by pulsed-electron deposition},
author = {Comes, Ryan and Liu, Hongxue and Lu, Jiwei and Khokhlov, Mikhail and Wolf, Stuart A and Department of Physics, University of Virginia, Charlottesville, Virginia 22904},
abstractNote = {Many works have demonstrated perpendicular magnetic anisotropy in CoFe{sub 2}O{sub 4}-BiFeO{sub 3} (CFO-BFO) composites, which is commonly believed to originate from out-of-plane compressive strain in the CFO pillars due to the lattice mismatch with the BFO matrix. Others have shown that the pillar-matrix interface in similar NiFe{sub 2}O{sub 4}-BFO composites is fully relaxed. To study the origin of the magnetic anisotropy, composite films were grown on SrTiO{sub 3} with thicknesses ranging from 13 to 150 nm via pulsed electron deposition. In-plane compressive strain in the pillars is found for thinner samples, which induces in-plane magnetoelastic anisotropy. A model for the origin of this previously unreported strain is proposed and the results are contrasted with the thicker composite films found in the literature.},
doi = {10.1063/1.3676413},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 7,
volume = 111,
place = {United States},
year = {2012},
month = {4}
}