Magneto-Transport Properties of Compression Molded CrO2-Polymer Composite

Abstract

We report detailed electrical and magnetotransport properties of compression molded CrO2—Polyimide polymer composites. The electrical transport data of the composites in the temperature range of 15—300 K were analyzed using a two-channel conductivity model based on spin dependent tunneling and multi-step hopping. The low temperature conductance is essentially dominated by spin dependent tunneling. The contribution from the multi-hopping conductivity increases with temperature increase. The presence of significant magnetoresistance in this composite is attributed partially to the opening of new conduction channels at the CrO2—polymer interface.

Department(s)

Physics, Astronomy, and Materials Science

Document Type

Article

DOI

https://doi.org/10.1177/0021998307079976

Keywords

half-metal, half-metal—polymer composite, conductivity, magnetoresistance

Publication Date

2007

Journal Title

Journal of composite materials

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