Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 321, Issue 11, Pages 1790-1794Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2009.02.016
Keywords
BiFeO3; Epitaxial nanostructures; Multiferroics; Oxide nanostructures; Spinel films
Funding
- ICREA Funding Source: Custom
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BiFeO3-CoFe2O4 epitaxial nanocomposites have been deposited on SrTiO3 (0 0 1) substrates by pulsed laser deposition. We present here a study of the influence of the deposition temperature (T-S), in the 550-800 degrees C range, on the film composition, morphology and microstructure. Electron-probe microanalysis shows strong reduction of the Bi content in the films when increasing TS. Films prepared at T-S = 750 degrees C and above are virtually Bi-free. X-ray diffraction (XRD) data show that, due to the volatility of Bi, there is a progressive reduction in the amount of BiFeO3. The deposition temperature and the concomitant presence of FexOy spurious phases in the nanocomposites grown at high temperature promote radical changes in film morphology and magnetization. It thus follows that a temperature range suitable for controlled modi. cation of nanocomposites morphology would be extremely narrow. (C) 2009 Elsevier B.V. All rights reserved.
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