Spin-dependent transport in nanocomposite C:co films
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- 作者：Shengqiang Zhou ; Markus Berndt ; Danilo Bü ; rger ; Viton Heera ; Kay Potzger ; Gintautas Abrasonis ; Gyö ; rgy Radnó ; czi ; Gyö ; rgy J. Ková ; cs ; Andreas Kolitsch ; Manfred Helm ; Jü ; rgen Fa
- 关键词：Carbon ; cobalt nanocomposite ; TEM ; Magneto-transport ; Anomalous hall effect ; Magnetic nanoparticles
- 刊名：Acta Materialia
- 出版年：2009
- 出版时间：September 2009
- 年：2009
- 卷：57
- 期：16
- 页码：4758-4764
- 全文大小：779 K
文摘
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 °C. Two major effects are reported: (i) a large anomalous Hall effect amounting to 2 μΩ 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.