Room temperature magnetoresistance in a polyimide-Co granular film synthesized by vapor deposition polymerization

Kazuya Z. Suzuki, Hideto Yanagihara, Tomohiko Niizeki, Ken Kojio, Eiji Kita

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    Magnetic and magnetotransport properties of pyromellitic dianhydride-4,4′-oxydianiline polyimide-Co granular thin films prepared by vapor deposition polymerization are investigated. The prepared sample is composed of Co particles with diameters of 2-3 nm homogeneously dispersed in a denatured polyimide matrix. The temperature dependence of the resistivity closely follows the T - 1 / 2 law, suggesting that the dominant conduction mechanism is tunneling between metallic granules embedded in the insulating polyimide matrix. The magnetoresistances at 300 and 90 K are 2.6 and 3.0, respectively. The results indicate that polyimide is a promising material for organic spintronics.

    Original languageEnglish
    Article number222401
    JournalApplied Physics Letters
    Volume101
    Issue number22
    DOIs
    Publication statusPublished - 2012 Nov 26

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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