Magnetoresistive phenomena in an Fe-filled carbon nanotube/elastomer composite

Hudziak, S., Darfeuille, A., Zhang, R., Peijs, T., Mountjoy, G., Bertoni, G., Baxendale, M. (2010) Magnetoresistive phenomena in an Fe-filled carbon nanotube/elastomer composite. Nanotechnology, 21 (12). p. 125505. ISSN 09574484 (ISSN). (doi:10.1088/0957-4484/21/12/125505) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Abstract

DC magnetoresistive effects were observed in above-percolation-threshold loaded Fe-filled carbon nanotube/polyurethane-urea composite samples. A phenomenological model is derived from interpretation of resistance relaxation for a range of axial strains. The large instantaneous magnetoresistance of + 90% observed at low axial strain was a result of conduction pathway breaking caused by preferential orientation of the conducting nanotubes perpendicular to the axial current flow: a result of the magnetic torque experienced by the ferromagnetic nanotube core. At large strain the observed large instantaneous change in resistance of - 90% resulted from voltage-driven relaxation in the conducting nanotube network. At high axial strain the competition between voltage-driven relaxation and a magnetic torque gave rise to an oscillatory component of resistance relaxation. © 2010 IOP Publishing Ltd.

Item Type: Article
DOI/Identification number: 10.1088/0957-4484/21/12/125505
Additional information: Unmapped bibliographic data: C7 - 125505 [EPrints field already has value set] LA - English [Field not mapped to EPrints] J2 - Nanotechnology [Field not mapped to EPrints] AD - Centre for Materials Research, Department of Physics, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom [Field not mapped to EPrints] AD - Département Sciences Matériaux, Ecole Polytechnique de l'Université de Nante, La Chanterie, rue Christian Pauc, BP 50609, F-44306 Nantes Cedex 3, France [Field not mapped to EPrints] AD - Centre for Materials Research, School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom [Field not mapped to EPrints] AD - School of Physical Sciences, University of Kent, Canterbury CT2 7NH, United Kingdom [Field not mapped to EPrints] AD - Istituto Italiano di Technologia, via Morego 30, I-16163 Genova, Italy [Field not mapped to EPrints] AD - EADS, Innovation Works, 12 rue Pasteur, F-92152 Suresnes, France [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: Axial currents, Axial strain, Composite samples, Conducting nanotubes, Large strains, Magnetic torques, Magneto-resistive effect, Magnetoresistive, Nanotube cores, Oscillatory components, Phenomenological models, Preferential orientation, Electric resistance, Magnetic field effects, Magnetoresistance, Nanotubes, Solvents, Urea, Strain
Subjects: Q Science > QC Physics > QC176 Solid state physics
Q Science > QC Physics
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Giles Tarver
Date Deposited: 16 Jan 2015 09:41 UTC
Last Modified: 29 May 2019 14:03 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46598 (The current URI for this page, for reference purposes)
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