Intrinsic Faraday spectra of ferromagnetic rutile Ti1-xCo xO2-δ

Yasushi Hirose, Taro Hitosugi, Yutaka Furubayashi, Go Kinoda, Kazuhisa Inaba, Toshihiro Shimada, Tetsuya Hasegawa

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    16 Citations (Scopus)

    Abstract

    We have investigated the Faraday spectra of ferromagnetic rutile Ti 1-xCoxO2-δ films grown on Al 2O3 (0001). The Faraday spectra strongly depended on the film thickness, revealing the significant effect of the multiple reflections of light. The intrinsic Faraday spectra of rutile Ti1-xCo xO2-δ were corrected for this multiple reflection effect on the basis of an optical model and compared with the absorption spectra in detail. The quantitatively good correspondence between intrinsic Faraday ellipticity and optical band edge strongly suggests that rutile Ti 1-xCoxO2-δ is an intrinsic ferromagnetic semiconductor. The exchange parameters, N0α and N 0β, were estimated as the order of ∼0.1 eV.

    Original languageEnglish
    Article number252508
    JournalApplied Physics Letters
    Volume88
    Issue number25
    DOIs
    Publication statusPublished - 2006 Jun 19

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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