Magnetism and structure of anatase (Ti1−xVx)O2 films

D. Le Roy, S. Valloppilly, R. Skomski, S.-H. Liou, D. J. Sellmyer
2012 Journal of Applied Physics  
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 1Àx V 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 l B with a magnetic percolation threshold of less than 6%
more » ... 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 1Àx V x )O 2 is no longer present beyond the solubility limit, where the nonmagnetic VO 2 phase forms and destroys the net magnetization. V C 2012 American Institute of Physics.
doi:10.1063/1.3679434 fatcat:wundtzcoi5ehbk4gy4mv5quzxq