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Electrical conduction and thermal properties of Bi-doped Pr0·7Sr0·3MnO3 manganite

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Abstract

Electrical and thermal properties of Bi-doped Pr 0·7 Sr 0·3 MnO 3 (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 (T MI, T C, T CP). Thermo-power measurements further strengthen our conclusion for the presence of magnetic polaron, generated due to hybridization of Bi3+–6s 2 and O2−–2p orbital and polaronic conduction mechanism.

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Acknowledgements

One of the authors (NK) is thankful to the Council of Scientific and Industrial Research (CSIR), India and further acknowledges the financial support to carry out research work at NPL. (AR) is grateful to the UGC-DAE Consortium for Scientific Research, Indore, for financial support under the scheme CSR-I/CSR/43/1462. The authors are thankful to Dr Rajiv Rawat, UGC-DAE CSR, Indore, for magneto-resistance measurements. Thermal measurements were supported by the National Science Council of Taiwan.

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Authors and Affiliations

  1. Department of Physics, Manipal Institute of Technology, Manipal University, Manipal, 576 104, India

    MAMATHA D DAIVAJNA

  2. Department of Physics, University of Trento, Trento, Italy

    NEERAJ KUMAR

  3. Superconductivity and Cryogenics Division, National Physical Laboratory (CSIR), Dr K S Krishnan Marg, New Delhi, 110 012, India

    BHASKER GAHTORI, V P S AWANA & Y K KUO

  4. Department of Physics, National Dong-Hwa University, Hualien, 974, Taiwan

    ASHOK RAO

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  1. MAMATHA D DAIVAJNA
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  2. NEERAJ KUMAR
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  4. V P S AWANA
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Correspondence to ASHOK RAO.

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DAIVAJNA, M.D., KUMAR, N., GAHTORI, B. et al. Electrical conduction and thermal properties of Bi-doped Pr0·7Sr0·3MnO3 manganite. Bull Mater Sci 37, 47–51 (2014). https://doi.org/10.1007/s12034-014-0624-y

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  • DOI: https://doi.org/10.1007/s12034-014-0624-y

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