Thermal properties of Pr2/3Sr1/3MnO3 manganites:PdO composites

Rao, Ashok and Manjunatha, S O and Bhatt, Ramesh Chandra and Awana, V P S and Lin, C F and Kuo, Y K and Poornesh, P (2017) Thermal properties of Pr2/3Sr1/3MnO3 manganites:PdO composites. Solid State Communications, 265 (1). pp. 37-40. ISSN 0038-1098

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Abstract

In the present communication the results on thermal conductivity, Seebeck coefficient and specific heat of Pr2/ 3Sr1/3MnO3:PdO composites are reported. All the samples exhibit a pronounced anomaly in thermal conductivity (κ) at their respective Curie temperatures, TC of the samples. It is also observed that the overall magnitude of κ decreases with increasing Pd content. The observed reduction of the total k(T) is discussed with various thermal scattering mechanisms. The temperature-dependent Seebeck coefficient data S(T) in the high temperature region is analyzed within the framework of Mott's polaron hopping model. The analysis of lowtemperature S(T) data reveals that the electron-magnon scattering contribution dominates the thermoelectric transport at low temperatures. The magnetic contribution for the CP and change in entropy (ΔS) during the magnetic phase transition is also evaluated.

Item Type: Article
Uncontrolled Keywords: Manganites,Composites,Specific heat,Entropy
Subjects: Engineering > MIT Manipal > Physics
Depositing User: MIT Library
Date Deposited: 05 Oct 2017 11:05
Last Modified: 05 Oct 2017 11:05
URI: http://eprints.manipal.edu/id/eprint/149766

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