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Co-doped La0.5Sr0.5TiO3-δ: Diluted magnetic oxide system with high Curie temperature

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14 Author(s)
Zhao, Y.G. ; Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742-4111 ; Shinde, S.R. ; Ogale, S.B. ; Higgins, J.
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Ferromagnetism is observed at and above room temperature in pulsed laser deposited epitaxial films of Co-doped Ti-based oxide perovskite (La0.5Sr0.5TiO3-δ). The system has the characteristics of an intrinsic diluted magnetic semiconductor (metal) at low concentrations (≪∼2%), but develops inhomogeneity at higher cobalt concentrations. The films range from being opaque metallic to transparent semiconducting depending on the oxygen pressure during growth and are yet ferromagnetic. © 2003 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:83 ,  Issue: 11 )

Date of Publication:

Sep 2003

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