Bhatt, Ramesh Chandra and Daivajna, Mamatha D and Rao, Ashok and Prasad, Shyam K. and Thomas, Riya and Nagaraja, B. S. and Awana, V. P. S. and Lin, C. F. and Ramachandran, B. and Kuo, Y. K. (2018) Influence of sintering temperature on the electrical and thermal properties of bulk samples of Pr2/3Sr1/3MnO3-delta. Physica B: Condensed Matter, 545. pp. 141-145. ISSN 0921-4526

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Abstract

We present temperature-dependent studies on electrical and thermal properties of bulk samples of Pr2/3Sr1/3MnO3-delta synthesized at different sintering temperatures (T-S). It is established that these properties intensely influenced by the sintering temperatures. Analysis of electrical resistivity data rho(T) by means of standard models, demonstrated that electron-electron scattering processes play a key role in the conduction process in the low-temperature region. At high temperatures, the rho(T) follows the small polaron hopping (SPH) model. Analyses of the Seebeck coefficient data S(T) in the low temperature regime illustrates that electron-magnon scattering governs the thermoelectric transport, on contrary, the high-temperature S(T) follows the SPH model. The low-temperature phonon peak in thermal conductivity kappa(T) increases with increasing T-S, demonstrating that a better crystallinity of Pr2/3Sr1/3MnO3 samples was obtained at higher sintering temperatures. Magnetic transitions are observed to increase with a higher T-S, and the entropy change associated with the transition also increases with T-S.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Subjects:	Physics
Divisions:	UNSPECIFIED
Depositing User:	Mr. Yogesh Joshi
Date Deposited:	14 Mar 2019 10:54
Last Modified:	14 Mar 2019 10:54
URI:	http://npl.csircentral.net/id/eprint/4010

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