Spin-dependent transport in nanocomposite C:Co films

Details Spin-dependent transport in nanocomposite C:Co films Spin-dependent transport in nanocomposite C:Co films

2009-08-02

arxiv.org/abs/0908.0127v1

Physics

Condensed Matter

Materials Science

13 pages, 7 figures

Scientific paper

10.1016/j.actamat.2009.06.035

The magneto-transport properties of nanocomposite C:Co (15 and 40 at.% Co) thin films are investigated. The films were grown by ion beam co-sputtering on thermally oxidized silicon substrates in the temperature range from 200 to 500 degC. Two major effects are reported: (i) a large anomalous Hall effect amounting to 2 \mu ohm cm, and (ii) a negative magnetoresistance. Both the field-dependent resistivity and Hall resistivity curves coincide with the rescaled magnetization curves, a finding that is consistent with spin-dependent transport. These findings suggest that C:Co nanocomposites are promising candidates for carbon-based Hall sensors and spintronic devices.

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