摘要
The magnetic field dependent transport behaviour of Co contacted multi-wall nanotubes is investigated. A sample with three Co electrodes has been measured by two-channel method with an in-plane magnetic field. When the in-plane magnetic field is perpendicular to the tube, high positive magnetoresistance up to 30% is obtained at low temperature from 3 K to 25K and with field parallel to the tube, negative magnetoresistance up to 15% is observed only from the high resistance junction. The detailed positive and negative magnetoresistance behaviour also changes with temperature.
The magnetic field dependent transport behaviour of Co contacted multi-wall nanotubes is investigated. A sample with three Co electrodes has been measured by two-channel method with an in-plane magnetic field. When the in-plane magnetic field is perpendicular to the tube, high positive magnetoresistance up to 30% is obtained at low temperature from 3 K to 25K and with field parallel to the tube, negative magnetoresistance up to 15% is observed only from the high resistance junction. The detailed positive and negative magnetoresistance behaviour also changes with temperature.
基金
Supported by the Science Foundation of Ireland （SFI）, China-Ireland Science and Technology Collaboration Research Fund between Science Foundation Ireland （SFI） and State Key Project of Fundamental Research Ministry of Science and Technology （M0ST） China under Grant No 2001CB610601, the National Natural Science Foundation of China under Grant Nos 10510136, 10574156 and 50271081, and the Distinct Young Researcher Foundation under Grant Nos 50325104 and 50528101.
