Chakraborty, Tirthankar and Gahtori, Bhasker and Ahsan, M. A. H. and -, Geetha and Chen, Y.-S. and Kuo, Y.-K. and Rao, Ashok and Sarkar, Chandan Kumar and Agrawal, S. K. (2009) Thermal conductivity and thermo-power of View the MathML source (View the MathML source and View the MathML source) bulk superconductors. Solid State Communications, 150 (9-10). pp. 454-457. ISSN 0038-1098

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Abstract

In this paper, we present temperature dependent electrical conductivity ρ(T), thermal conductivity κ(T) and thermoelectric power S(T) for co-doped superconducting compounds Y 0.95Pr0.5Ba2(Cu1−xMx)3O7−δ(M=Fe,Mn,Zn and Ni). The XRD patterns confirm that all the samples are single phased. Pristine Y Ba2Cu3O7−δ depicts a pronounced hump-like structure in κ(T) below its transition temperature. With Pr-doping, a reduction in the peak height of the hump is observed. It is found that the hump structure is further suppressed with transition metal co-doping, and is viewed in terms of the phonon scattering with defect structure, electrons and phonons. S(T) data depicting a sign reversal with co-doping, has been analyzed in the framework of a narrow band model.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier B.V.
Uncontrolled Keywords:	High TC superconductors; D. Transport properties
Subjects:	Physics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	24 Jul 2012 07:17
Last Modified:	24 Jul 2012 07:17
URI:	http://npl.csircentral.net/id/eprint/373

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