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Type: Artigo de periódico
Title: Inhomogeneous Superconductivity In Bi2sr2ca1-xprxcu2o8+ δ
Author: Dos Santos C.A.M.
Moehlecke S.
Kopelevich Y.
Machado A.J.S.
Abstract: We have studied Pr doping effect on the superconducting transition temperature onset TC(x) in Bi2Sr2Ca1-xPrxCu2O8+ δ superconducting polycrystalline samples by means of both resistance R(T,x) and magnetization M(T,x) measurements. It is found that while the resistively determined TCR(x) rapidly decreases with x for x > 0.4, the TCM ≈ 85 K obtained from magnetization measurements remains unchanged. We argue that the suppression of TCR(x) is related to the reduction of the sample superconducting volume fraction which ultimately leads to disconnected superconducting clusters. Resistive behavior measured at different applied currents in a sample close to percolation threshold supports this discussion. © 2002 Elsevier Science B.V. All rights reserved.
Citation: Physica C: Superconductivity And Its Applications. , v. 390, n. 1, p. 21 - 26, 2003.
Rights: fechado
Identifier DOI: 10.1016/S0921-4534(02)02802-2
Date Issue: 2003
Appears in Collections:Unicamp - Artigos e Outros Documentos

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