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

Kazuya Suzuki | Zendy; Hideto Yanagihara | Zendy; Tomohiko Niizeki | Zendy; Ken Kojio | Zendy; Eiji Kita | Zendy

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

Author(s) -

Kazuya Suzuki,

Hideto Yanagihara,

Tomohiko Niizeki,

Ken Kojio,

Eiji Kita

Publication year - 2012

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4768783

Subject(s) - polyimide , pyromellitic dianhydride , materials science , polymerization , chemical vapor deposition , magnetoresistance , electrical resistivity and conductivity , deposition (geology) , thin film , composite material , chemical engineering , polymer chemistry , polymer , nanotechnology , layer (electronics) , magnetic field , paleontology , physics , engineering , quantum mechanics , sediment , electrical engineering , biology

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

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