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Giant positive magnetoresistance in metallic VOx thin films

A. D. Rata, V. Kataev, D. Khomskii, and T. Hibma
Phys. Rev. B 68, 220403(R) – Published 17 December 2003
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Abstract

We report on giant positive magnetoresistance (MR) 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.

  • Received 1 October 2003

DOI:https://doi.org/10.1103/PhysRevB.68.220403

©2003 American Physical Society

Authors & Affiliations

A. D. Rata1, V. Kataev2,3, D. Khomskii2,4, and T. Hibma1

  • 1Chemical Physics Department, Groningen University, Nijenborgh 4, 9747 AG Groningen, The Netherlands
  • 2Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, 50937 Köln, Germany
  • 3Kazan Physical Technical Institute, Russian Academy of Sciences, 420111 Kazan, Russia
  • 4Laboratory of Solid State Physics, Groningen University, Nijenborgh 4, 9747 AG Groningen, The Netherlands

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Issue

Vol. 68, Iss. 22 — 1 December 2003

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