Paper Title:
Transport and Magnetic Properties of CrO2-Polymer Magnetic Composites
  Abstract

We report the transport and magnetic properties of sintered CrO2-polymer composites. In order to improve the elastic properties of the CrO2-based composites, we investigated two types of styrene-based copolymers: poly(methyl methacrylate)-styrene (9/1 and 5/5) and linear polysiloxaneg- styrene as well as poly(methyl methacrylate)–butadiene 9/1. The electric transport and magnetoresistance are consistent with the spin tunneling model at low temperatures but the contribution of spin independent channels becomes important at high temperature and high fields. All composites display ferromagnetism at room temperature with saturation at low fields and a slightly temperature-dependent coercive field for the samples grafted either with butadiene or with styrene except for CrO2-polysiloxane-g-styrene composite where it exponentially decreases with increasing temperature.

  Info
Periodical
Advanced Materials Research (Volumes 47-50)
Edited by
Alan K.T. Lau, J. Lu, Vijay K. Varadan, F.K. Chang, J.P. Tu and P.M. Lam
Pages
326-330
DOI
10.4028/www.scientific.net/AMR.47-50.326
Citation
V. Sandu, S. Popa, C. Plapcianu, E. Sandu, N. Hurduc, I. Nor, "Transport and Magnetic Properties of CrO2-Polymer Magnetic Composites", Advanced Materials Research, Vols. 47-50, pp. 326-330, 2008
Online since
June 2008
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Price
$32.00
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