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Title: Magnetic, magnetotransport, and optical properties of Al-doped Zn0.95Co0.05O thin films
Sponsor: Science Foundation Ireland
Irish Research Council for Science Engineering and Technology
Author's Homepage:
Keywords: Physics
Issue Date: 2007
Publisher: American Institute of Physics
Citation: 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, 242508
Series/Report no.: Applied Physics Letters
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 0.3–1.0μB 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.
Description: PUBLISHED
Appears in Collections:Physics (Scholarly Publications)

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