Daivajna, Mamatha D. and Kumar, Neeraj and Awana, V. P. S. and Gahtori, Bhasker and Christopher, J. Benedict and Manjunath, S.O. and Syu, K. Z. and Kuo, Y. K. and Rao, Ashok (2014) Electrical, magnetic and thermal properties of Pr0.6-xBixSr0.4MnO3 manganites. Journal of Alloys and Compounds, 588. pp. 406-412. ISSN 0925-8388

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Abstract

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.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/S Elsevier.
Uncontrolled Keywords:	Manganites Metal–insulator transition Thermal conductivity Specific heat Magnetization
Subjects:	Chemistry Materials Science Metallurgy & Metallurgical Engineering
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	01 Oct 2015 05:44
Last Modified:	01 Oct 2015 05:44
URI:	http://npl.csircentral.net/id/eprint/1264

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