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Magnetotransport Properties of Compression Molded CrO2-Polyimide Composite

MRS Online Proceedings Library volume 847, pages 164–168 (2004)Cite this article

Abstract

The conductivity and magnetotransport properties of compression molded half-metallic CrO2/Polyimide composites over a range of different metallic concentrations have been studied. The conductivity measurements on these composites show negative slope of resistance versus temperature. The magnetoresistance measurement indicates obvious enhancement at low temperatures. The maximum in magnetoresistance (MR) is found to be temperature and metal volume fraction dependent. Significant differences in high and low temperature magnetoresistive behavior in the composite have been observed. The high field, 15 T MR measurements show 23% and 19% MR enhancement at 5K and 75 K, respectively. Thus, it is found that the polymer barrier can contribute to enhancing magnetoresistive properties of the composite.

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Acknowledgments

Authors would like to thank National High Field Magnetic Laboratory (NHFML), Tallahassee, FL for providing experimental time to conduct high field magnetotransport measurements.

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Authors and Affiliations

  1. Department of Physics, The University of Memphis, Memphis, TN, USA

    Sanjay R. Mishra & Joe Losby

  2. Department of Physics, Astronomy, and Materials Science, Southwest Missouri-State University, Springfield, MO, USA

    Kartik Ghosh & Ted Kehl

  3. Department of Physics, Rhodes College, Memphis, TN, USA

    Ann Viano

Authors
  1. Sanjay R. Mishra
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  2. Kartik Ghosh
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  3. Joe Losby
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  4. Ted Kehl
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  5. Ann Viano
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Mishra, S.R., Ghosh, K., Losby, J. et al. Magnetotransport Properties of Compression Molded CrO2-Polyimide Composite. MRS Online Proceedings Library 847, 164–168 (2004). https://doi.org/10.1557/PROC-847-EE13.23

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  • DOI: https://doi.org/10.1557/PROC-847-EE13.23