Electron transport in magnetite nanoparticles

ORAL

Abstract

Magnetite (Fe$_{3}$O$_{4})$ is an example of a strongly correlated, mixed valence oxide. Electron transport through small numbers of monodisperse magnetite nanocrystals (20nm in diameter) is measured on nanometer-scale three-terminal devices where nanoparticles are decorated on lithographically defined platinum electrodes. The abrupt development of discontinuities on IV curves around 120K and below strongly suggests the particles are going through the Verwey transition. Initial measurements of the full range of IV characteristics and magnetoresistive behaviors of these devices are presented.

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Authors

  • S. Lee

    Department of Physics and Astronomy, Rice University, Physics and Astronomy, Rice University, Rice University Dept. of Physics and Astronomy

  • John T. Mayo

    Chemistry, Rice University

  • Vikki L. Colvin

    Chemistry, Rice University

  • Doug Natelson

    Physics and Astronomy, Rice University, Rice University, Department of Physics and Astronomy, Rice University, Rice University Dept. of Physics and Astronomy