Journal
APPLIED PHYSICS LETTERS
Volume 100, Issue 9, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3690957
Keywords
bismuth compounds; cobalt compounds; compressive strength; epitaxial growth; magnetic anisotropy; magnetic hysteresis; magnetoelastic effects; nanocomposites; pulsed laser deposition; strontium compounds
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Funding
- DARPA
- Nanoelectronics Research Initiative, Samsung
- NSF MRSEC Center for Materials Science and Engineering
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BiFeO3/CoFe2O4 (BFO/CFO) nanocomposites were grown on SrTiO3 by pulsed laser deposition using a combinatorial method in which Bi1.2FeO3 and CoFe2O4 targets are alternately ablated. The films had the same vertically nanostructured morphology as thin films prepared by ablation of a single target, consisting of epitaxial CoFe2O4 pillars in a BiFeO3 matrix. In a series of samples synthesized with a compositional spread, the out-of-plane magnetic anisotropy and the out-of-plane compressive strain of the CoFe2O4 pillars increased with decreasing volume fraction, and the anisotropy agreed with the value predicted from the strain state and magnetoelastic coefficients of CoFe2O4. These results show the dominant effect of magnetoelastic anisotropy in determining the magnetic hysteresis of the nanocomposite. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3690957]
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