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http://hdl.handle.net/10397/4878
Title: | Magnetoresistivity of cobalt-polytetrafluoroethylene granular composites | Authors: | Kwong, HYA Wong, MH Wong, YW Wong, KH |
Issue Date: | 23-Oct-2006 | Source: | 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). | Keywords: | Filled polymers Granular materials Giant magnetoresistance Magnetic thin films Pulsed laser deposition Infrared spectra Tunnelling Cobalt Ferromagnetic materials |
Publisher: | American Institute of Physics | Journal: | Applied physics letters | ISSN: | 0003-6951 | EISSN: | 1077-3118 | 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 |
Appears in Collections: | Journal/Magazine Article |
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