Daivajna, Mamatha D and Kumar, Neeraj and Gahtori, Bhaskar and Awana, V P S and Kuo, Y K and Rao, Ashok (2014) Electrical conduction and thermal properties of Bi-doped Pr0·7Sr0·3MnO3 manganite. Bulletin of Materials Science, 37 (1). pp. 47-51. ISSN 0250-4707

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Abstract

Electrical and thermal properties of Bi-doped Pr0·7Sr0·3MnO3 (PSMO) compounds are reported here. It is observed that Bi-doped PSMO compounds follow variable range conduction mechanism. Specific heat, thermal conductivity and thermo-power measurements show that larger Bi-ion, in place of smaller Pr ion, enhances their transition temperatures (TMI, TC, TCP). Thermo-power measurements further strengthen our conclusion for the presence of magnetic polaron, generated due to hybridization of Bi3+–6s2 and O2−–2p orbital and polaronic conduction mechanism.

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