Enhancement of magneto-optical properties of anatase Co:TiO2 Co-doped with Nb

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

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)

    Abstract

    We have fabricated Ti0.95-xNbxCo0.05O 2 thin films by the pulsed laser deposition technique. Carrier density was found to be almost identical to the Nb concentration up to x = 0.06, indicating that doped Nb atoms generate carriers with >80% efficiency. In this doping range, magneto-optical properties were significantly enhanced by Nb-doping. The remanent Faraday rotation at a wavelength of 405 nm was as high as 5.6 × 103 deg/cm, which is approximately one order of magnitude higher than that of a film free of Nb-doping. The present results support the hypothesis that conduction electrons play an essentialrole in the ferromagnetism of Co-doped TiO2.

    Original languageEnglish
    Pages (from-to)L387-L389
    JournalJapanese Journal of Applied Physics, Part 2: Letters
    Volume45
    Issue number12-16
    DOIs
    Publication statusPublished - 2006 May 17

    Keywords

    • Co-doping
    • DMS
    • Diluted magnetic semiconductor
    • Epitaxial
    • Ferromagnetism
    • PLD
    • Pulsed laser deposition
    • Thin film
    • TiO

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy (miscellaneous)
    • Physics and Astronomy(all)

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