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Spin Transport in Multi Wall Carbon Nanotubes with Co Electrodes |
WANG Tian-Xing1;WEI Hong-Xiang1;HAN Xiu-Feng1;R. M. Langford2;Martin Thornton2;M. A. Bari2;J. M. D. Coey2 |
1State Key Laboratory of Magnetism, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
2Department of Physics, Trinity College, Dublin 2, Ireland |
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Cite this article: |
WANG Tian-Xing, WEI Hong-Xiang, HAN Xiu-Feng et al 2006 Chin. Phys. Lett. 23 2852-2855 |
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Abstract 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 btained at low temperature from 3K 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.
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Keywords:
73.63.Fg
85.35.Kt
75.47.-m
72.25.Mk
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Published: 01 October 2006
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PACS: |
73.63.Fg
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(Nanotubes)
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85.35.Kt
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(Nanotube devices)
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75.47.-m
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(Magnetotransport phenomena; materials for magnetotransport)
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72.25.Mk
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(Spin transport through interfaces)
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Abstract
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