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Proceedings Paper

An investigation on granular-nanocomposite-based giant magnetoresistance (GMR) sensor fabrication
Author(s): Zhanhu Guo; Suying Wei; Sung Park; Monica Moldovan; Amar Karki; David Young; H. Thomas Hahn
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Paper Abstract

The magnetoresistance behavior of the polyurethane composites reinforced with iron nanoparticles which has been heat treated was reported. The flexible nanocomposites were fabricated by the surface-initiated-polymerization (SIP) method. The uniformly distributed nanoparticles within the polymer matrix, well characterized by field emission scanning electron microscopy, favor a continuous carbon matrix formation after annealing, rendering the transition from insulating to conductive composites. The coercive forces reflect strong particle loading and matrix dependent magnetic properties. The obtained nanocomposites possess fairly good giant magnetoresistance (MR), with a MR of 7.3 % at room temperature and 14 % at 130 K. Furthermore, the formed carbon matrix has a 7 wt.% argon adsorption potential for fuel cell applications.

Paper Details

Date Published: 17 April 2007
PDF: 8 pages
Proc. SPIE 6526, Behavior and Mechanics of Multifunctional and Composite Materials 2007, 65260U (17 April 2007); doi: 10.1117/12.715367
Show Author Affiliations
Zhanhu Guo, Univ. of California, Los Angeles (United States)
Suying Wei, Louisiana State Univ. (United States)
Sung Park, Univ. of California, Los Angeles (United States)
Monica Moldovan, Louisiana State Univ. (United States)
Amar Karki, Louisiana State Univ. (United States)
David Young, Louisiana State Univ. (United States)
H. Thomas Hahn, Univ. of California, Los Angeles (United States)

Published in SPIE Proceedings Vol. 6526:
Behavior and Mechanics of Multifunctional and Composite Materials 2007
Marcelo J. Dapino, Editor(s)

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