Magnetotransport properties in epitaxial Fe3O4(001) thin films with current perpendicular to the plane geometry

H. Yanagihara, K. Shimada, T. Niizeki, E. Kita, J. Inoue, A. Fukushima, S. Yuasa

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    4 Citations (Scopus)

    Abstract

    We investigated the fundamental transport properties of epitaxial magnetite (Fe3O4) films with applied current perpendicular to the plane geometry. The devices with a junction area of 36 μ m 2 were fabricated with TiN/Fe3O4/ TM (TM: Ti and Fe) stacking. Both the temperature dependence and the magnetic field dependence of the junction resistance were measured. Most of the resistance properties were independent of whether the electrode was magnetic (Fe) or nonmagnetic (Ti). Below the Verwey point, the junction resistance abruptly increased with decreasing temperature, and the resistance reached maximum at approximately 30 K. The magnetoresistance showed a peak of ∼ 27 at T ≈ 55 K. The observed resistance behavior was consistent with a hopping conduction mechanism with a Coulomb interaction.

    Original languageEnglish
    Article number17B104
    JournalJournal of Applied Physics
    Volume113
    Issue number17
    DOIs
    Publication statusPublished - 2013 May 7

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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