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

doi:10.1016/j.ssc.2017.08.004

Thermal properties of Pr_2/3Sr_1/3MnO₃ manganites: PdO composites

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

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Abstract

In the present communication the results on thermal conductivity, Seebeck coefficient and specific heat of Pr_2/3Sr_1/3MnO₃:PdO composites are reported. All the samples exhibit a pronounced anomaly in thermal conductivity (κ) at their respective Curie temperatures, T_C 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 C_P and change in entropy (ΔS) during the magnetic phase transition is also evaluated.

Original language	English
Pages (from-to)	37-40
Number of pages	4
Journal	Solid State Communications
Volume	265
DOIs	https://doi.org/10.1016/j.ssc.2017.08.004
Publication status	Published - 01-10-2017

All Science Journal Classification (ASJC) codes

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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title = "Thermal properties of Pr2/3Sr1/3MnO3 manganites: PdO composites",

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.",

author = "Ashok Rao and Manjunatha, {S. O.} and Bhatt, {Ramesh Chandra} and Awana, {V. P.S.} and Lin, {C. F.} and Kuo, {Y. K.} and P. Poornesh",

year = "2017",

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doi = "10.1016/j.ssc.2017.08.004",

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TY - JOUR

T1 - Thermal properties of Pr2/3Sr1/3MnO3 manganites

T2 - PdO composites

AU - Rao, Ashok

AU - Manjunatha, S. O.

AU - Bhatt, Ramesh Chandra

AU - Awana, V. P.S.

AU - Lin, C. F.

AU - Kuo, Y. K.

AU - Poornesh, P.

PY - 2017/10/1

Y1 - 2017/10/1

N2 - 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.

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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DO - 10.1016/j.ssc.2017.08.004

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SN - 0038-1098

VL - 265

SP - 37

EP - 40

JO - Solid State Communications

JF - Solid State Communications

ER -

Thermal properties of Pr_2/3Sr_1/3MnO₃ manganites: PdO composites

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