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Applied Physics Letters / Volume 96 / Issue 9 / MAGNETISM AND SUPERCONDUCTIVITY

Appl. Phys. Lett. 96, 092503 (2010); http://dx.doi.org/10.1063/1.3309588 (3 pages)

The role of carriers in spin current and magnetic coupling for ZnO:Co diluted magnetic oxides

H. Chou1, C. P. Lin1, H. S. Hsu2, and S. J. Sun3

1Department of Physics and Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
2Department of Applied Physics, National Pintung University of Education, Pintung 900, Taiwan
3Department of Applied Physics, National University of Kaohsiung, Kaohsiung 811, Taiwan

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(Received 29 September 2009; accepted 28 December 2009; published online 1 March 2010)

The role of carriers in the electric conduction and magnetic coupling of diluted magnetic oxides is essential to the spin current formation. This study elucidates the conduction of electrons originating from oxygen vacancies and the magnetic coupling between major doped transition ions. The findings indicate that electrons may conduct in the conduction band or by hopping within discrete localized states. Furthermore, because d-orbital of doped transition ions overlap with these localized states, only hopping electrons contribute to magnetic coupling and spin current formation. Those electrons in the conduction band have no observable effect on magnetic coupling.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

cobalt, conduction bands, hopping conduction, II-VI semiconductors, localised states, semiconductor doping, semiconductor thin films, semimagnetic semiconductors, spin-orbit interactions, vacancies (crystal), wide band gap semiconductors, zinc compounds

PACS

  • 73.61.Ga

    II-VI semiconductors

  • 81.05.Dz

    II-VI semiconductors

  • 75.50.Pp

    Magnetic semiconductors

  • 72.20.Ee

    Mobility edges; hopping transport

  • 71.70.Ej

    Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect

  • 75.25.Dk

    Orbital, charge, and other orders, including coupling of these orders

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3309588

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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