Studies of two- and three-dimensional ZnO:Co structures through different synthetic routes

A. B. Pakhomov, B. K. Roberts, A. Tuan, V. Shutthanandan, D. McCready, S. Thevuthasan, S. A. Chambers, Kannan M. Krishnan

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    Abstract

    The synthesis of Al codoped ZnO:Co dilute magnetic semiconductor (DMS) bulk films using metalorganic chemical vapor deposition, and DMS superlattices by ion beam sputtering (IBS), with the Curie temperature higher than the room temperature was analyzed. The magnetization, magnetoresistance, and resistivity measurements, which were performed in the temperature range of 2.5-300 K, were also analyzed. The morphology of the DMS films and superlattices was investigated using x-ray diffraction. It was found that overdoping with cobalt had resulted in the supression of high temperature ferromagnetism in the multilayers, and a crossover to superparamagnetism with varied dimensionality.

    Original languageEnglish
    Pages (from-to)7393-7395
    Number of pages3
    JournalJournal of Applied Physics
    Volume95
    Issue number11 II
    DOIs
    Publication statusPublished - 1 Jun 2004

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    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Pakhomov, A. B., Roberts, B. K., Tuan, A., Shutthanandan, V., McCready, D., Thevuthasan, S., Chambers, S. A., & Krishnan, K. M. (2004). Studies of two- and three-dimensional ZnO:Co structures through different synthetic routes. Journal of Applied Physics, 95(11 II), 7393-7395. https://doi.org/10.1063/1.1669224