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Spin-coherent transport in ferromagnetically contacted carbon nanotubes (2002)

Zhao, B. ; Mönch, I. ; Vinzelberg, H. ; [et al.]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 80 (2002), S. 3144-3146

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: The spin-coherent quantum transport through multiwall carbon nanotubes contacted by ferromagnetic Co pads is investigated experimentally. At 4.2 K, the devices show a remarkable increase of the magnetoresistance (MR) ratio with decreasing junction bias, reaching a maximum MR ratio of 30% at a junction bias current of 1 nA. The experimental results suggest the transport to be dominated by spin-dependent tunneling processes at the Co/nanotube interfaces and governed by the local magnetization. We also observe an asymmetry of the magnetoresistance peak position and width which is attributed to a local exchange biasing in the electrode material. © 2002 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1471570

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