Specific heat and correlation between resistivity and thermoelectric power of GdBa2(Cu1-xMnx)3O7-δ HTSC system for x ≤ 0.02

Bhasker Gahtori; S. K. Agarwal; Tirthankar Chakraborty; Ashok Rao; Y. K. Kuo

doi:10.1016/j.physc.2008.10.004

Specific heat and correlation between resistivity and thermoelectric power of GdBa₂(Cu_1-xMn_x)₃O_7-δ HTSC system for x ≤ 0.02

Bhasker Gahtori, S. K. Agarwal, Tirthankar Chakraborty, Ashok Rao, Y. K. Kuo

Department of Physics, Manipal Institute of Technology, Manipal

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

In this communication we present some theoretical results of specific heat and thermoelectric power of the superconductor GdBa₂(Cu_1-xMn_x)₃O_7-δ (for x ≤ 0.02). A model based on separate electronic and phononic contributions is used for the interpretation of the specific heat data while a narrow band model is used for the analysis of thermoelectric power. On the basis of these models two main conclusions have been drawn about the relative effects of different Mn contents: (1) the observed fluctuation effects near T_c whose strength increases with increasing Mn content and (2) Mn produces mainly electronic effects for lower Mn contents, while for higher doping levels (x > 0.0075) Mn predominantly causes carrier-Mn scattering process.

Original language	English
Pages (from-to)	27-29
Number of pages	3
Journal	Physica C: Superconductivity and its Applications
Volume	469
Issue number	1
DOIs	https://doi.org/10.1016/j.physc.2008.10.004
Publication status	Published - 01-01-2009

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.physc.2008.10.004

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abstract = "In this communication we present some theoretical results of specific heat and thermoelectric power of the superconductor GdBa2(Cu1-xMnx)3O7-δ (for x ≤ 0.02). A model based on separate electronic and phononic contributions is used for the interpretation of the specific heat data while a narrow band model is used for the analysis of thermoelectric power. On the basis of these models two main conclusions have been drawn about the relative effects of different Mn contents: (1) the observed fluctuation effects near Tc whose strength increases with increasing Mn content and (2) Mn produces mainly electronic effects for lower Mn contents, while for higher doping levels (x > 0.0075) Mn predominantly causes carrier-Mn scattering process.",

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AU - Chakraborty, Tirthankar

AU - Rao, Ashok

AU - Kuo, Y. K.

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Specific heat and correlation between resistivity and thermoelectric power of GdBa₂(Cu_1-xMn_x)₃O_7-δ HTSC system for x ≤ 0.02

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