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Type: Artigo de periódico
Title: Electronic depiction of magnetic origin in undoped and Fe doped TiO2-d epitaxial thin films
Author: Bapna, K
Choudhary, RJ
Pandey, SK
Phase, DM
Sharma, SK
Knobel, M
Abstract: We have investigated the electronic and magnetic properties of the pulsed laser deposited epitaxial thin films of undoped and Fe doped (4 at. %) anatase TiO2-d by photoemission, magnetization measurements, and ab-initio band structure calculations. These films show room temperature magnetic ordering. It is observed that Fe ions hybridize with the oxygen vacancy induced Ti3+ defect states. Our study reveals the formation of local magnetic moment at Ti and Fe sites to be responsible for magnetic ordering. A finite density of states at the Fermi level in both undoped and Fe doped films is also observed, suggesting their degenerate semiconducting nature. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3640212]
Country: EUA
Editor: Amer Inst Physics
Citation: Applied Physics Letters. Amer Inst Physics, v. 99, n. 11, 2011.
Rights: aberto
Identifier DOI: 10.1063/1.3640212
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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