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Physical and chemical properties of nanostructured CoO-AlOx granular films |
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| Authors: | J.G. Lin C.K. Hsu T.J. Chuang |
| Affiliation: | a Center for Condensed Matter Sciences, National Taiwan University, 1 Roosevelt Road, Sec. 4, Taipei 10764, Taiwan b Department of Physics, National Taiwan University, Taipei, Taiwan c Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan |
| Abstract: | A series of nano CoO-AlOx granular films were prepared by Ar-O2 reactive rf sputtering and their resistive and magnetoresistive properties were measured for studying the spin-dependent properties. Transmission electron microscopy and X-ray photoelectron spectroscopy are also utilized to investigate the structures and chemical states of these samples. Based on our results, the particles of CoO with radius around 2 nm could be magnetic at room temperature and provide a large tunneling magnetoreststance of −6% through the AlOx barrier. |
| Keywords: | 75.20.Pa 75.50.Tt |
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