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Carbon Nanotube Based Magnetic Tunnel Junctions for Electromagnetic Nondestructive Evaluation

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Abstract

Spin coherent transport in carbon nanotubes enables single-nanotube devices for magnetic field sensing. This unique transport property of single walled carbon nanotubes (SWCNTs) has been studied for development into advanced sensors for nondestructive evaluation (NDE). Coupling of a single walled carbon nanotube to ferromagnetic electrodes is predicted to form a carbon nanotube magnetic tunnel junction. Fabrication of such devices has been performed through scanning probe and electron beam lithography. Purified single walled carbon nanotubes are deposited across electrodes to complete device fabrication. A spincoherent quantum transport theory based on a nonequilibrium Green’s function method has been established to predict conductance and magnetoconductance across junctions. Experimental measurements of the room temperature conductance of Cobalt/SWCNT/Cobalt junctions have been performed.

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Authors and Affiliations

  1. NASA LaRC Hampton, VA, 23681, USA

    Buzz Wincheski & Min Namkung

  2. Kangwon University Chunchon, Korea

    Sun Mok Paik

  3. Lockheed Martin Engineering and Sciences Corporation Hampton, VA, 23681, USA

    Jan Smits

Authors
  1. Buzz Wincheski
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  2. Min Namkung
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  3. Sun Mok Paik
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  4. Jan Smits
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Wincheski, B., Namkung, M., Paik, S.M. et al. Carbon Nanotube Based Magnetic Tunnel Junctions for Electromagnetic Nondestructive Evaluation. MRS Online Proceedings Library 721, 610 (2002). https://doi.org/10.1557/PROC-721-E6.10

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  • DOI: https://doi.org/10.1557/PROC-721-E6.10

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