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Carbon Nanotube Based Magnetic Tunnel Junctions for Electromagnetic Nondestructive Evaluation

Published online by Cambridge University Press:  01 February 2011

Buzz Wincheski ,
Min Namkung ,
Sun Mok Paik  and
Jan Smits
Buzz Wincheski
Affiliation:
NASA LaRC Hampton VA 23681
Min Namkung
Affiliation:
NASA LaRC Hampton VA 23681
Sun Mok Paik
Affiliation:
Kangwon University Chunchon, Korea
Jan Smits
Affiliation:
Lockheed Martin Engineering and Sciences Corporation Hampton VA, 23681
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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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 721: Symposia E/J – Texture and Microstructure in Electronic and Magnetic Films – Nanostructural Magnetic Materials for Data Storage , 2002 , E6.10
Copyright
Copyright © Materials Research Society 2002

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