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

Ashok Rao, S. O. Manjunatha, Ramesh Chandra Bhatt, V. P.S. Awana, C. F. Lin, Y. K. Kuo, P. Poornesh

Research output: Contribution to journalArticle

1 Citation (Scopus)

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 low-temperature 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.

Original languageEnglish
Pages (from-to)37-40
Number of pages4
JournalSolid State Communications
Volume265
DOIs
Publication statusPublished - 01-10-2017

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Manganites
Seebeck effect
thermal conductivity
Thermodynamic properties
thermodynamic properties
composite materials
Seebeck coefficient
Composite materials
Curie temperature
Thermal conductivity
electron scattering
communication
specific heat
entropy
anomalies
Gene Conversion
heat
Temperature
Electron scattering
scattering

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

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

In: Solid State Communications, Vol. 265, 01.10.2017, p. 37-40.

Research output: Contribution to journalArticle

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AU - Rao, Ashok

AU - Manjunatha, S. O.

AU - Bhatt, Ramesh Chandra

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AB - 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 low-temperature 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.

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