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

Journal Article · Sun Apr 01 04:00:00 EDT 2012 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3676413· OSTI ID:22038930

Comes, Ryan; Liu, Hongxue; Lu, Jiwei ^[1]; Khokhlov, Mikhail ^[2]; Wolf, Stuart A ^[1]

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1. Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904 (United States)
2. Guilford College, Greensboro, North Carolina 27410 (United States)

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.

• OSTI ID: 22038930
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 111; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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