Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 588, Issue -, Pages 406-412Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.11.033
Keywords
Manganites; Metal-insulator transition; Thermal conductivity; Specific heat; Magnetization
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Funding
- Council of Scientific and Industrial Research (CSIR), India
- UGC-DAE Consortium for Scientific Research, Indore [CSR-I/CSR/43/1462]
- National Science Council of Taiwan [NSC-100- 2112-M-259-002-MY3]
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In the present communication, we report the electrical, magnetic and thermal properties of Bi-doped Pr0.6Sr0.4MnO3 (PSMO) compounds. These measurements show that the transition temperature decreases with Bi-content. Analyses on the measured electrical resistivity and thermoelectric power data indicate that the small polaron hopping model is operative in the high temperature paramagnetic phase for all samples. The thermal conductivity, kappa(T) for samples studied in the present work is found to be low which is essentially due to Jahn-Teller (JL) distortion in the samples. It is observed that kappa(T) is seen to decrease with increase in doping concentration of Bi which is possibly due to the formation of JT polarons which act as scattering centers. From specific heat measurements, we observe reduction in values of entropy change with increase in bismuth content which suggests that the magnetic inhomogeneity increases with Bi substitution. (C) 2013 Elsevier B. V. All rights reserved.
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