Magnetism and structure of anatase (Ti 1-xV x)O 2 films

D. Le Roy, S. Valloppilly, R. Skomski, Sy-Hwang Liou, David J Sellmyer

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Abstract

Anatase TiO 2 is known as a promising host material for a wide-gap ferromagnetic semiconductor as it is a good solvent for numerous transition-metal elements. We report on the structural and magnetic properties of epitaxially grown anatase (Ti 1-xV x)O 2 layers where x covers the whole range of solubility of V atoms in anatase TiO 2 and beyond the solubility limit of 21. We measured an average magnetic moment per vanadium as high as 1 μ B with a magnetic percolation threshold of less than 6 which agrees with recent theoretical predictions. Interestingly, our results show a decrease of the average V magnetic moment as x increases throughout the solubility range. Anatase (Ti 1-xV x)O 2 is no longer present beyond the solubility limit, where the nonmagnetic VO 2 phase forms and destroys the net magnetization.

Original languageEnglish (US)
Article number07C118
JournalJournal of Applied Physics
Volume111
Issue number7
DOIs
Publication statusPublished - Apr 1 2012

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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