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Browsing by Author "Chen, Hsuan-Shao"

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    Optical and Magnetic Properties of Zn1-xMnxO Grown by Plasma-Assisted Molecular Beam Epitaxy
    (2014-06-01)
    Chou, Wu Ching
    ;
    Tzou, An-Jye
    ;
    Chen, Hsuan-Shao
    ;
    Chien, Kun-Feng
    ;
    Fan, Wen-Chung
    Zn1-xMnxO films (0 <= x <= 0.070) were grown by plasma-assisted molecular beam epitaxy on Si substrates with AlN buffer layers. For low Mn concentration samples, x <= 0.02, photoluminescence spectra show strong near band edge emission. Strong phonon and exciton coupling-induced resonant Raman scattering was observed. Paramagnetic, antiferromagnetic, and ferromagnetic phases were observed. Room temperature ferromagnetism for all samples was attributed to the bound magnetic polaron effect.