Daivajna, Mamatha D and Rao, Ashok and Okram, G S (2015) Electrical and thermal studies on Bi-substituted LSMO manganites. Journal of magnetism and Magnetic materials. ISSN 0304-8853

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Abstract

In the present investigation electrical, magnetic and thermoelectric measurements on Bi-doped L0.6-xBixSr0.4MnO3 (0≤x≤0.3) manganites have been done. All the samples are single phased. The metal-insulator transition temperatures (TMI) found to decrease with Bi-content. Magneto-resistance (MR) data shows that MR (%) increases with Bi-content thereby showing it can be used in magnetic memory based devices. Resistivity data shows that small polaron hopping (SPH) model is valid in high temperature regime. Low temperature resistivity data depicts that electron-electron scattering is mainly responsible for the conduction mechanism. High temperature thermoelectric power (TEP) data reaffirms the validity of SPH model.

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