Abstract
We report a considerable intrinsic positive magnetoresistance (PMR) effect in Co-doped amorphous carbon films by radio frequency magnetron sputtering. The kind of PMR effect is bias dependence and its ratio reaches a peak at a particular voltage. At room temperature, the maximum PMR ratio is about 10% among these samples. The x-ray absorption spectroscopy and Raman spectra results support the appearance of the bias-dependent PMR effect strongly depends on the sp2 states and Co dopants. A phenomenological model related to orbital Zeeman splitting has been proposed to describe the resistance, which is controlled by voltage and magnetic field.
Original language | English |
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Article number | 032503 |
Journal | Applied Physics Letters |
Volume | 97 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2010 Jul 19 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)