Anomalous thermoelectric power of Ag-containing (-type superconductors prepared by a glass-ceramic method

S. Chatterjee, S. Banerjee, B. Chaudhuri, N. Froumin, M. Polak, J. Baram

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7 Scopus citations

Abstract

Accurately measured electrical resistivity and thermoelectric power of (1-10 wt. %)-Ag-containing (Bi, Pb(Formula presented)(Formula presented)(Formula presented)(Formula presented)(Formula presented)-type superconductors prepared by a glass-ceramic method are reported. Due to the presence of Ag, the volume fraction of the superconducting 2223 phase is found to be highly reduced. Though the variation of resistivity with temperature shows normal behavior, the temperature variation of thermoelectric power (or Seebeck coefficient S) of the Ag-containing glass-ceramic superconductor is highly nonlinear showing both positive and negative values consistently for all the compositions studied. Unlike many other oxide superconductors, the two-band model of Xin et al. [Phys. Rev. B 48, 557 (1993)] is not adequate to explain the said anomalous thermoelectric power data of the present system. The appearance of double peaks in the S versus temperature curves of the samples support the phonon drag effect.

Original languageEnglish
Pages (from-to)10143-10149
Number of pages7
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume54
Issue number14
DOIs
StatePublished - 1 Jan 1996

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