| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7852509 | Carbon | 2015 | 5 Pages |
Abstract
Co-doped amorphous carbon (Co:a-C) films, which comprise a homogeneously mixed carbon matrix phase with approximately 5Â at.% cobalt, were deposited on quartz glass by radio frequency magnetron sputtering. A bias-dependent positive magnetoresistance (PMR) with a peak at a particular voltage was observed. The electronic structures were examined by ultraviolet photoelectron spectroscopy and X-ray absorption near edge spectroscopy. The spectroscopic results reveal that Co doping promotes the graphitization in the a-C matrix and the 3d orbital of Co is hybridized with sp2 states (DOSs) in the Co:a-C. The PMR effect is related to the modulation of the DOS of the Co:a-C films at the Fermi level by Zeeman splitting.
Related Topics
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Energy (General)
Authors
P.Y. Chuang, J.C.A. Huang, P.E. Lu, H.S. Hsu, S.J. Sun, Y.W. Yang, J.M. Chen, C.H. Lee,