FLUCTUATION CONDUCTIVITY EFFECTS ON THERMOELECTRIC POWER OF GRANULAR Bi1.75Pb0.25Ca2Sr2Cu3O10 SUPERCONDUCTOR

10 March 1989

journal article
Published by World Scientific Pub Co Pte Ltd in Modern Physics Letters B

Vol. 3 (3) , 241-248
https://doi.org/10.1142/s0217984989000406

Abstract

We report precise measurements of the thermoelectric power (TEP) of granular superconducting Bi _1.75 Pb _0.25 Ca ₂ Sr ₂ Cu ₃ O ₁₀. The TEP is strictly linear at high temperature. Superconductivity fluctuations set in at about 140 K. From the temperature derivative of the excess TEP (with respect to a straight line at “high temperature”), the critical behavior is obtained in the mean field regime, and is found identical to that of the temperature derivative of the excess electrical resistivity.

Keywords

BEHAVIOR
SUPERCONDUCTIVITY
THERMOELECTRIC POWER
FLUCTUATION
STRAIGHT
GRANULAR

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