Flux-Line-Lattice Melting and Upper Critical Field of Bi1.65Pb0.35Sr2Ca2Cu3O10+delta Ceramic Samples


Autoria(s): Govea-Alcaide, E.; Mune, P.; Jardim, Renato de Figueiredo
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

30/09/2013

30/09/2013

2012

Resumo

We have conducted magnetoresistance measurements rho(T,H) in applied magnetic fields up to 18 T in Bi1.65Pb0.35Sr2Ca2Cu3O10+delta ceramic samples which were subjected to different uniaxial compacting pressures. The anisotropic upper critical fields H (c2)(T) were extracted from the rho(T,H) data, yielding and the out-of-plane superconducting coherence length xi (c) (0)similar to 3 . We have also estimated and xi (ab) (0) similar to 90 . In addition to this, a flux-line-lattice (FLL) melting temperature T (m) has been identified as a second peak in the derivative of the magnetoresistance d rho/dT data close to the superconducting transition temperature. An H (m) vs. T phase diagram was constructed and the FLL boundary lines were found to obey a temperature dependence H (m) ae(T (c) /T-1) (alpha) , where alpha similar to 2 for the sample subjected to the higher compacting pressure. A reasonable value of the Lindemann parameter c (L) similar to 0.29 has been found for all samples studied.

Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2010/52545-2]

Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)

Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)

Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [304112/2010-0]

Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)

Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)

Identificador

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, NEW YORK, v. 25, n. 4, pp. 779-784, MAY, 2012

1557-1939

http://www.producao.usp.br/handle/BDPI/33815

10.1007/s10948-011-1338-7

http://dx.doi.org/10.1007/s10948-011-1338-7

Idioma(s)

eng

Publicador

SPRINGER

NEW YORK

Relação

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM

Direitos

restrictedAccess

Copyright SPRINGER

Palavras-Chave #BI-BASED SUPERCONDUCTORS #WEAK LINKS #ELECTRICAL CONDUCTIVITY #HIGH-TEMPERATURE SUPERCONDUCTORS #MAGNETIC-FIELD #POLYCRYSTALLINE SM2-XCEXCUO4-Y #ACTIVATION-ENERGY #CRITICAL CURRENTS #C-AXIS #ANISOTROPY #BEHAVIOR #STATE #YBA2CU3O7-DELTA #PHYSICS, APPLIED #PHYSICS, CONDENSED MATTER
Tipo

article

original article

publishedVersion