Irreversibility limits of the Abrikosov and Josephson flux dynamics in homogeneous and granular high-T/sub c/ superconductors
Autor(a) principal: | |
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Data de Publicação: | 2001 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/103843 |
Resumo: | The magnetic irreversibility of a high-quality YBa₂Cu₃O₇₋₈ single crystal and of the granular superconductors YBa₁.₅Sr₀.₅Cu₃O₇₋₈ and YBa₁.₇₅Sr₀.₂₅Cu₃O₇₋₈ single crystals and the polycrystalline YBa₁.₇₅Sr₀.₂₅Cu₃O₇₋₈ sample in two different oxygen states was determined in great detail, as a function of applied field up to 5 T from zero-field-cooled and field-cooled dc magnetization. While the Tirr data of the pure single crystal are well described by the power law, predicted by the flux-creep models, in the whole field range, those of the granular superconductors adhere to this power law only in the high-field region. In a low-field region two quite different regimes take place: In the lowest fields the data obey a de Almeida-Thouless-like power law and above a sharp crossover field they follow a Gabay-Toulouse-like power law. These low-field features are acknowledged as the signature of a frustrated system. |
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Vieira, Valdemar das NevesSilva Filho, Job Paim daSchaf, Jacob2014-09-26T02:10:50Z20011098-0121http://hdl.handle.net/10183/103843000301990The magnetic irreversibility of a high-quality YBa₂Cu₃O₇₋₈ single crystal and of the granular superconductors YBa₁.₅Sr₀.₅Cu₃O₇₋₈ and YBa₁.₇₅Sr₀.₂₅Cu₃O₇₋₈ single crystals and the polycrystalline YBa₁.₇₅Sr₀.₂₅Cu₃O₇₋₈ sample in two different oxygen states was determined in great detail, as a function of applied field up to 5 T from zero-field-cooled and field-cooled dc magnetization. While the Tirr data of the pure single crystal are well described by the power law, predicted by the flux-creep models, in the whole field range, those of the granular superconductors adhere to this power law only in the high-field region. In a low-field region two quite different regimes take place: In the lowest fields the data obey a de Almeida-Thouless-like power law and above a sharp crossover field they follow a Gabay-Toulouse-like power law. These low-field features are acknowledged as the signature of a frustrated system.application/pdfengPhysical review. B, Condensed matter and materials physics. Woodbury. Vol. 64, no. 9 (Sept. 2001), 094516 7p.Compostos de bárioSupercondutores de alta temperaturaMagnetizaçãoCompostos de estrôncioCompostos de ítrioIrreversibility limits of the Abrikosov and Josephson flux dynamics in homogeneous and granular high-T/sub c/ superconductorsEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000301990.pdf000301990.pdfTexto completo (inglês)application/pdf353428http://www.lume.ufrgs.br/bitstream/10183/103843/1/000301990.pdf0203af8095855411c2048e679613294eMD51TEXT000301990.pdf.txt000301990.pdf.txtExtracted Texttext/plain32775http://www.lume.ufrgs.br/bitstream/10183/103843/2/000301990.pdf.txtba59cfea86b50c3e1e50289e3cded71eMD52THUMBNAIL000301990.pdf.jpg000301990.pdf.jpgGenerated Thumbnailimage/jpeg2020http://www.lume.ufrgs.br/bitstream/10183/103843/3/000301990.pdf.jpga45af437273c59b09ea2359fd6a1cd2cMD5310183/1038432018-10-08 08:14:16.706oai:www.lume.ufrgs.br:10183/103843Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-08T11:14:16Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Irreversibility limits of the Abrikosov and Josephson flux dynamics in homogeneous and granular high-T/sub c/ superconductors |
title |
Irreversibility limits of the Abrikosov and Josephson flux dynamics in homogeneous and granular high-T/sub c/ superconductors |
spellingShingle |
Irreversibility limits of the Abrikosov and Josephson flux dynamics in homogeneous and granular high-T/sub c/ superconductors Vieira, Valdemar das Neves Compostos de bário Supercondutores de alta temperatura Magnetização Compostos de estrôncio Compostos de ítrio |
title_short |
Irreversibility limits of the Abrikosov and Josephson flux dynamics in homogeneous and granular high-T/sub c/ superconductors |
title_full |
Irreversibility limits of the Abrikosov and Josephson flux dynamics in homogeneous and granular high-T/sub c/ superconductors |
title_fullStr |
Irreversibility limits of the Abrikosov and Josephson flux dynamics in homogeneous and granular high-T/sub c/ superconductors |
title_full_unstemmed |
Irreversibility limits of the Abrikosov and Josephson flux dynamics in homogeneous and granular high-T/sub c/ superconductors |
title_sort |
Irreversibility limits of the Abrikosov and Josephson flux dynamics in homogeneous and granular high-T/sub c/ superconductors |
author |
Vieira, Valdemar das Neves |
author_facet |
Vieira, Valdemar das Neves Silva Filho, Job Paim da Schaf, Jacob |
author_role |
author |
author2 |
Silva Filho, Job Paim da Schaf, Jacob |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Vieira, Valdemar das Neves Silva Filho, Job Paim da Schaf, Jacob |
dc.subject.por.fl_str_mv |
Compostos de bário Supercondutores de alta temperatura Magnetização Compostos de estrôncio Compostos de ítrio |
topic |
Compostos de bário Supercondutores de alta temperatura Magnetização Compostos de estrôncio Compostos de ítrio |
description |
The magnetic irreversibility of a high-quality YBa₂Cu₃O₇₋₈ single crystal and of the granular superconductors YBa₁.₅Sr₀.₅Cu₃O₇₋₈ and YBa₁.₇₅Sr₀.₂₅Cu₃O₇₋₈ single crystals and the polycrystalline YBa₁.₇₅Sr₀.₂₅Cu₃O₇₋₈ sample in two different oxygen states was determined in great detail, as a function of applied field up to 5 T from zero-field-cooled and field-cooled dc magnetization. While the Tirr data of the pure single crystal are well described by the power law, predicted by the flux-creep models, in the whole field range, those of the granular superconductors adhere to this power law only in the high-field region. In a low-field region two quite different regimes take place: In the lowest fields the data obey a de Almeida-Thouless-like power law and above a sharp crossover field they follow a Gabay-Toulouse-like power law. These low-field features are acknowledged as the signature of a frustrated system. |
publishDate |
2001 |
dc.date.issued.fl_str_mv |
2001 |
dc.date.accessioned.fl_str_mv |
2014-09-26T02:10:50Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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info:eu-repo/semantics/publishedVersion |
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publishedVersion |
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http://hdl.handle.net/10183/103843 |
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1098-0121 |
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000301990 |
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1098-0121 000301990 |
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http://hdl.handle.net/10183/103843 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physical review. B, Condensed matter and materials physics. Woodbury. Vol. 64, no. 9 (Sept. 2001), 094516 7p. |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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