학술논문
Investigation of the cobalt distribution in TiO[sub 2]:Co thin films.
Document Type
Article
Author
Source
Subject
*THIN films
*TITANIUM dioxide films
*COBALT
*PULSED laser deposition
*
*
*
Language
ISSN
0021-8979
Abstract
We report a detailed study of the morphology of TiO[sub 2]:Co films grown on both LaAlO[sub 3] (001) and SrTiO[sub 3] (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 μ[sub 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 SrTiO[sub 3] 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. [ABSTRACT FROM AUTHOR]