Room temperature magnetoresistance in a polyimide-Co granular film synthesized by vapor deposition polymerization

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Abstract

Magnetic and magnetotransport properties of pyromellitic dianhydride-4,4′-oxydianiline polyimide-Co granular thin films prepared by vapor deposition polymerization are investigated. The prepared sample is composed of Co particles with diameters of 2-3 nm homogeneously dispersed in a denatured polyimide matrix. The temperature dependence of the resistivity closely follows the T - 1 / 2 law, suggesting that the dominant conduction mechanism is tunneling between metallic granules embedded in the insulating polyimide matrix. The magnetoresistances at 300 and 90 K are 2.6 and 3.0, respectively. The results indicate that polyimide is a promising material for organic spintronics. © 2012 American Institute of Physics.

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Suzuki, K. Z., Yanagihara, H., Niizeki, T., Kojio, K., & Kita, E. (2012). Room temperature magnetoresistance in a polyimide-Co granular film synthesized by vapor deposition polymerization. Applied Physics Letters, 101(22). https://doi.org/10.1063/1.4768783

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