Giant positive magnetoresistance in metallic VOx thin films

Details Giant positive magnetoresistance in metallic VOx thin films Giant positive magnetoresistance in metallic VOx thin films

2003-07-08

arxiv.org/abs/cond-mat/0307174v2

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figures included in the text, references updated

Scientific paper

10.1103/PhysRevB.68.220403

We report on giant positive magnetoresistance effect observed in VOx thin films, epitaxially grown on SrTiO3 substrate. The MR effect depends strongly on temperature and oxygen content and is anisotropic. At low temperatures its magnitude reaches 70% in a magnetic field of 5 T. Strong electron-electron interactions in the presence of strong disorder may qualitatively explain the results. An alternative explanation, related to a possible magnetic instability, is also discussed.

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