Fluctuation conductivity of polycrystalline Y1-xPr xBa2Cu3O7-delta superconductors
Autor(a) principal: | |
---|---|
Data de Publicação: | 2005 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Physics |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332005000400001 |
Resumo: | We studied the effect of superconducting fluctuations on the electrical conductivity of granular samples of Y1 - xPr xBa2Cu3O7-delta superconductors, with x = 0.01, 0.03, 0.05, 0.07 and 0.10. Samples were prepared by the standard solid-state reaction technique, with two different types of calcination process, in air at 900 ºC ( x < 0.07 ) and in vacuum at 850 ºC ( 0.05 < x < 0.10 ). For the samples prepared in air, our results revealed a splitting of the bulk transition, denoted by T C1 and T C2, besides the coherence transition. It was observed fluctuation regimes above the highest transition ( T C1 ) and the lowest transition ( T C2 ). For the samples calcinated in vacuum and high concentrations of Pr, changes were observed in the critical region with chemical substitution of the Pr ion for the Y ion. In the regime of approach to the zero resistance state it was observed an occurrence of a coherence transition for all concentrations of praseodymium. |
id |
SBF-2_1b0b7aeecc4dd93353180b7885dcce25 |
---|---|
oai_identifier_str |
oai:scielo:S0103-97332005000400001 |
network_acronym_str |
SBF-2 |
network_name_str |
Brazilian Journal of Physics |
repository_id_str |
|
spelling |
Fluctuation conductivity of polycrystalline Y1-xPr xBa2Cu3O7-delta superconductorsWe studied the effect of superconducting fluctuations on the electrical conductivity of granular samples of Y1 - xPr xBa2Cu3O7-delta superconductors, with x = 0.01, 0.03, 0.05, 0.07 and 0.10. Samples were prepared by the standard solid-state reaction technique, with two different types of calcination process, in air at 900 ºC ( x < 0.07 ) and in vacuum at 850 ºC ( 0.05 < x < 0.10 ). For the samples prepared in air, our results revealed a splitting of the bulk transition, denoted by T C1 and T C2, besides the coherence transition. It was observed fluctuation regimes above the highest transition ( T C1 ) and the lowest transition ( T C2 ). For the samples calcinated in vacuum and high concentrations of Pr, changes were observed in the critical region with chemical substitution of the Pr ion for the Y ion. In the regime of approach to the zero resistance state it was observed an occurrence of a coherence transition for all concentrations of praseodymium.Sociedade Brasileira de Física2005-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332005000400001Brazilian Journal of Physics v.35 n.3a 2005reponame:Brazilian Journal of Physicsinstname:Sociedade Brasileira de Física (SBF)instacron:SBF10.1590/S0103-97332005000400001info:eu-repo/semantics/openAccessJurelo,Alcione RobertoAraújo,Celmir Lupack deSiqueira,Ezequiel CostaCantão,Maurício Pereiraeng2005-10-17T00:00:00Zoai:scielo:S0103-97332005000400001Revistahttp://www.sbfisica.org.br/v1/home/index.php/pt/ONGhttps://old.scielo.br/oai/scielo-oai.phpsbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br1678-44480103-9733opendoar:2005-10-17T00:00Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF)false |
dc.title.none.fl_str_mv |
Fluctuation conductivity of polycrystalline Y1-xPr xBa2Cu3O7-delta superconductors |
title |
Fluctuation conductivity of polycrystalline Y1-xPr xBa2Cu3O7-delta superconductors |
spellingShingle |
Fluctuation conductivity of polycrystalline Y1-xPr xBa2Cu3O7-delta superconductors Jurelo,Alcione Roberto |
title_short |
Fluctuation conductivity of polycrystalline Y1-xPr xBa2Cu3O7-delta superconductors |
title_full |
Fluctuation conductivity of polycrystalline Y1-xPr xBa2Cu3O7-delta superconductors |
title_fullStr |
Fluctuation conductivity of polycrystalline Y1-xPr xBa2Cu3O7-delta superconductors |
title_full_unstemmed |
Fluctuation conductivity of polycrystalline Y1-xPr xBa2Cu3O7-delta superconductors |
title_sort |
Fluctuation conductivity of polycrystalline Y1-xPr xBa2Cu3O7-delta superconductors |
author |
Jurelo,Alcione Roberto |
author_facet |
Jurelo,Alcione Roberto Araújo,Celmir Lupack de Siqueira,Ezequiel Costa Cantão,Maurício Pereira |
author_role |
author |
author2 |
Araújo,Celmir Lupack de Siqueira,Ezequiel Costa Cantão,Maurício Pereira |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Jurelo,Alcione Roberto Araújo,Celmir Lupack de Siqueira,Ezequiel Costa Cantão,Maurício Pereira |
description |
We studied the effect of superconducting fluctuations on the electrical conductivity of granular samples of Y1 - xPr xBa2Cu3O7-delta superconductors, with x = 0.01, 0.03, 0.05, 0.07 and 0.10. Samples were prepared by the standard solid-state reaction technique, with two different types of calcination process, in air at 900 ºC ( x < 0.07 ) and in vacuum at 850 ºC ( 0.05 < x < 0.10 ). For the samples prepared in air, our results revealed a splitting of the bulk transition, denoted by T C1 and T C2, besides the coherence transition. It was observed fluctuation regimes above the highest transition ( T C1 ) and the lowest transition ( T C2 ). For the samples calcinated in vacuum and high concentrations of Pr, changes were observed in the critical region with chemical substitution of the Pr ion for the Y ion. In the regime of approach to the zero resistance state it was observed an occurrence of a coherence transition for all concentrations of praseodymium. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-09-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332005000400001 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332005000400001 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-97332005000400001 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
dc.source.none.fl_str_mv |
Brazilian Journal of Physics v.35 n.3a 2005 reponame:Brazilian Journal of Physics instname:Sociedade Brasileira de Física (SBF) instacron:SBF |
instname_str |
Sociedade Brasileira de Física (SBF) |
instacron_str |
SBF |
institution |
SBF |
reponame_str |
Brazilian Journal of Physics |
collection |
Brazilian Journal of Physics |
repository.name.fl_str_mv |
Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF) |
repository.mail.fl_str_mv |
sbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br |
_version_ |
1754734861954842624 |