PolyU IR
 

PolyU Institutional Repository >
Applied Physics >
AP Journal/Magazine Articles >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/4878

Title: Magnetoresistivity of cobalt-polytetrafluoroethylene granular composites
Authors: Kwong, Ho-yin Anthony
Wong, Man-hon
Wong, Yuen-wah
Wong, Kin-hung
Subjects: Filled polymers
Granular materials
Giant magnetoresistance
Magnetic thin films
Pulsed laser deposition
Infrared spectra
Tunnelling
Cobalt
Ferromagnetic materials
Issue Date: 23-Oct-2006
Publisher: American Institute of Physics
Citation: Applied physics letters, 23 Oct. 2006, v. 89, no. 17, 173109, p. 1-3.
Abstract: Giant magnetoresistance (GMR) was observed in a heterogeneous granular film with polymer matrix. Cobalt and polytetrafluoroethylene (PTFE) were deposited on glass substrates by using the pulsed laser deposition technique. IR absorption spectra of the deposited PTFE showed similar characteristics with the bulk PTFE. The granular samples exhibit a resistance change of about 5% (at 10 kOe) at room temperature. The temperature dependence of resistance of the samples shows that charge transportation is mainly due to tunneling between the metal particles. The GMR can thus be interpreted by the spin-dependent electrons tunneling through the ferromagnetic metal granules (cobalt) in the insulating matrix (PTFE).
Description: DOI: 10.1063/1.2364270
Rights: © 2006 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in H. Y. Kwong et al., Appl. Phys. Lett. 89, 173109 (2006) and may be found at http://link.aip.org/link/?apl/89/173109
Type: Journal/Magazine Article
URI: http://hdl.handle.net/10397/4878
ISSN: 0003-6951 (print)
1077-3118 (online)
Appears in Collections:AP Journal/Magazine Articles

Files in This Item:

File Description SizeFormat
Kwong_Magnetoresistivity_Granular_Composites.pdf150.94 kBAdobe PDFView/Open



Facebook Facebook del.icio.us del.icio.us LinkedIn LinkedIn


All items in the PolyU Institutional Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
No item in the PolyU IR may be reproduced for commercial or resale purposes.

 

© Pao Yue-kong Library, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
Powered by DSpace (Version 1.5.2)  © MIT and HP
Feedback | Privacy Policy Statement | Copyright & Restrictions - Feedback