Ferromagnetic rutile CoxTi1-xO2-δ heteroepitaxy on wurtzite GaN and ZnO

Yasushi Hirose, Taro Hitosugi, Junpei Kasai, Yutaka Furubayashi, Kiyomi Nakajima, Toyohiro Chikyow, Seiji Konuma, Toshihiro Shimada, Tetsuya Hasegawa

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    Rutile CoxTi1-xO2-δ (100) films were heteroepitaxially grown on GaN (0001) and ZnO (0001) by pulsed laser deposition. Magneto-optical Kerr effect measurements indicated that the Co xTi1-xO2-δ films grown at appropriate oxygen partial pressure show room-temperature ferromagnetism both on GaN (0001) and ZnO (0001) substrate. XRD and cross-sectional TEM measurements confirmed solid solution of Co in rutile TiO2 matrix without any precipitates and secondary phases. High-resolution TEM observation of the Co xTi1-xO2-δ/GaN interface revealed atomically smooth interface without intermixing, which promises the application of CoxTi1-xO2-δ in opto-spintronics devices as a spin injector.

    Original languageEnglish
    Pages (from-to)3104-3106
    Number of pages3
    JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
    Issue number9
    Publication statusPublished - 2008 Dec 1
    Event34th International Symposium on Compound Semiconductors, ISCS-2007 - Kyoto, Japan
    Duration: 2007 Oct 152007 Oct 18

    ASJC Scopus subject areas

    • Condensed Matter Physics

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    Hirose, Y., Hitosugi, T., Kasai, J., Furubayashi, Y., Nakajima, K., Chikyow, T., Konuma, S., Shimada, T., & Hasegawa, T. (2008). Ferromagnetic rutile CoxTi1-xO2-δ heteroepitaxy on wurtzite GaN and ZnO. Physica Status Solidi (C) Current Topics in Solid State Physics, 5(9), 3104-3106. https://doi.org/10.1002/pssc.200779251