4.6 Article Proceedings Paper

Spin transport in nanotubes (invited)

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JOURNAL OF APPLIED PHYSICS
卷 89, 期 11, 页码 6863-6867

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AMER INST PHYSICS
DOI: 10.1063/1.1359220

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We study electron spin transport through carbon nanotubes contacted by ferromagnetic electrodes. The resistance of a ferromagnetically contacted multiwalled nanotube switches hysteretically as a function of applied magnetic field, with a maximum resistance change of 9% at 4.2 K. Magnetoresistance measurements of carbon nanotubes having one cobalt contact and one platinum/gold contact, however, show no switching. In addition, we present calculations of the magnetoresistance ratio for the ferromagnetic nanotube device, and predict that a resistance change of 25% is possible. (C) 2001 American Institute of Physics.

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