Magnetic, magnetotransport, and optical properties of Al-doped Zn0.95Co0.05O thin films
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2007Citation:
M. Venkatesan, P. Stamenov, L. S. Dorneles, R. D. Gunning and J. M. D. Coey 'Magnetic, magnetotransport, and optical properties of Al-doped Zn0.95Co0.05O thin films' in Applied Physics Letters, 90, (24), 2007, 242508Download Item:
Abstract:
Thin films of 5% Co-doped ZnO with a range of Al codoping exhibit a band-edge shift, which varies with carrier concentration as n2/3. Carrier effective mass is 0.26me and mobility is ~ 10?cm2?V?1?s?1. The doped films, which contain coherent Co clusters of 4?8?nm in size, exhibit a ferromagnetic moment of 0.3?1.0?B per cobalt. The magnetism is progressively destroyed by Al doping due to a reduction in Co-cluster formation. Magnetoresistance appears below 30?K, but these materials cannot be regarded as dilute magnetic semiconductors.
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Science Foundation Ireland
Irish Research Council for Science Engineering and Technology
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Science Foundation IrelandIrish Research Council for Science Engineering and Technology
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American Institute of PhysicsType of material:
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Applied Physics Letters90
24
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