%0 Journal Article
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%X A detailed study of the effect caused by the partial substitution of Er by Ce on fluctuation conductivity of the Er(1-x)Ce(x)Ba(2)Cu(3)O(7-delta); 0 <= x <= 0.10; is presented. The combined experimental results of structural and electrical measurements indicate that Ce substitutes Er for x <= 0.10 with no significant structural distortions. However, there is suppression of the superconducting state with zero-resistance state at temperatures >= 86.3 K. The results were analyzed in terms of the temperature derivative of the resistivity and the logarithmic temperature derivative of the conductivity to identify power-law divergences of the conductivity. The data revealed the occurrence of a two-stage intragranular-intergranular transition. Above the critical temperature, the Gaussian and critical regimes were observed. Also, from the critical exponents analysis, we observed a splitting of the pairing transition for Ce-doped samples, suggesting the occurrence of a phase separation. On approaching the zero resistance state, our results showed a power-law behavior that corresponds to a phase transition from a paracoherent to a coherent state of the granular array and which does not depend on Ce doping.
%@mirrorrepository sid.inpe.br/mtc-m19@80/2009/08.21.17.02.53
%8 Aug
%N 20
%T Fluctuation-induced conductivity of polycrystalline  Er(1-x)Ce(x)Ba(2)Cu(3)O(7-delta) SUPERCONDUCTOR
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%@electronicmailaddress arjurelo@uepg.br
%@secondarytype PRE PI
%K High-T(C) superconductor, polycrystalline, Erbium, Cerium, critical phenomena, fluctuation effects, HIGH-TEMPERATURE SUPERCONDUCTORS, HIGH-TC SUPERCONDUCTORS, NORMAL-STATE PROPERTIES, RARE-EARTH, PR, YBA2CU3O7-DELTA, SUPPRESSION, TRANSITION, COMPOUND, GD.
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%@usergroup banon
%@usergroup marciana
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%@group LCP-CTE-INPE-MCT-BR
%@secondarykey INPE--PRE/
%@issn 0217-9849
%2 sid.inpe.br/mtc-m19/2011/11.17.15.03.59
%@affiliation Departamento de Física, Universidade Estadual de Ponta Grossa, Av. Gen. Carlos Cavalcanti 4748, 84.030-000, Ponta Grossa, Paraná, Brazil
%@affiliation Departamento de Física, Universidade Estadual de Ponta Grossa, Av. Gen. Carlos Cavalcanti 4748, 84.030-000, Ponta Grossa, Paraná, Brazil
%@affiliation Departamento de Física, Universidade Estadual de Ponta Grossa, Av. Gen. Carlos Cavalcanti 4748, 84.030-000, Ponta Grossa, Paraná, Brazil
%@affiliation Departamento de Física, Universidade Estadual de Ponta Grossa, Av. Gen. Carlos Cavalcanti 4748, 84.030-000, Ponta Grossa, Paraná, Brazil
%@affiliation Departamento de Física, Universidade Estadual de Ponta Grossa, Av. Gen. Carlos Cavalcanti 4748, 84.030-000, Ponta Grossa, Paraná, Brazil
%@affiliation Univ Estadual Ponta Grossa, Dept Fis, Av Gen Carlos Cavalcanti 4748, BR-84030000 Ponta Grossa, Parana, Brazil
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@project CNPq 474077/2007-1
%B Modern Physics Letters B
%@versiontype publisher
%P 1671-1681
%4 sid.inpe.br/mtc-m19/2011/11.17.15.03
%@documentstage not transferred
%D 2011
%V 25
%@doi 10.1142/S0217984911026929
%A Opata, Yuri Aparecido,
%A Kurelo, Anderson Rosa,
%A Leite, Lincoln Brum de,
%A Pinheiro, Gusmao,
%A Rodrigues Junior, Pedro,
%A Jurelo, Alcione Roberto,
%A Siqueira, Ezequiel Costa,
%@dissemination WEBSCI; PORTALCAPES; COMPENDEX.
%@area FISMAT