Journal
JOURNAL OF APPLIED PHYSICS
Volume 92, Issue 12, Pages 7114-7121Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1521259
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We report a detailed study of the morphology of TiO2:Co films grown on both LaAlO3 (001) and SrTiO3 (001) substrates by pulsed laser deposition. The films are optically transparent and ferromagnetic at room temperature with a magnetic moment of 1.7+/-0.4 mu(B)/Co. Plan view transmission electron microscope studies show clear evidence of cobalt segregation with the clustering more pronounced for higher cobalt concentrations. Films grown on SrTiO3 substrates show the presence of a thin surface rutile (111) layer, into which the cobalt appears to migrate. These results are supported by x-ray structure determination and resistivity measurements. (C) 2002 American Institute of Physics.
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