Anisotropic irreversibility of the Abrikosov and Josephson flux dynamics in YBa/sub 2-x/Sr/sub x/Cu/sub 3/O/sub 7-[delta]/ single crystals : Bose-glass and vortex-glass features
Autor(a) principal: | |
---|---|
Data de Publicação: | 2002 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/103926 |
Resumo: | Very detailed magnetic irreversibility data for fields applied along the c axis or the ab plane of a pure and untwinned YBa₂Cu₃O₇₋₈ single crystal and Sr-doped and heavily twinned YBa₂₋xSrxCu₃O₇₋₈ (x=0.25, 0.37, and 0.5) single crystals are reported. The irreversibility lines Tirr(H) of the pure single crystal show a considerable planar anisotropy but follow the same power-law regime, for both field orientations, arising within the conventional flux-creep theories in the whole field range. Very differently, however, the Tirr(H) lines of the doped superconductors exhibit besides large anisotropies, several different regimes. In fields lower than 8 kOe the Tirr(H) data of the doped samples display the de Almeida–Thouless (AT) and Gabay-Toulouse (GT)-like power-law behaviors, the signature of a frustrated superconductor. For higher-field values, and in particular for H||c, flux dynamics seems to be conventional. However, for H||ab and field values above 30 kOe, the flux dynamics displays sharp directional properties along the twinning planes (TP’s) for rotations about the c axis. This behavior is cusplike, comparable to that caused by columnar defects, which characterizes a Bose-flux-glass phase. We appoint the superconducting granularity and frustration as responsible for the AT and GT behaviors below 8 kOe and the strong anisotropic pinning for H parallel to the TP’s as the cause of the Bose-glass features. On the other hand, the isotropic pinning for large angular displacements or for any angle in fields below 30 kOe is the most probable cause of the vortex-glass features. |
id |
UFRGS-2_c42489f568152226f06d836b0cff7372 |
---|---|
oai_identifier_str |
oai:www.lume.ufrgs.br:10183/103926 |
network_acronym_str |
UFRGS-2 |
network_name_str |
Repositório Institucional da UFRGS |
repository_id_str |
|
spelling |
Vieira, Valdemar das NevesSchaf, Jacob2014-09-30T02:12:34Z20021098-0121http://hdl.handle.net/10183/103926000314037Very detailed magnetic irreversibility data for fields applied along the c axis or the ab plane of a pure and untwinned YBa₂Cu₃O₇₋₈ single crystal and Sr-doped and heavily twinned YBa₂₋xSrxCu₃O₇₋₈ (x=0.25, 0.37, and 0.5) single crystals are reported. The irreversibility lines Tirr(H) of the pure single crystal show a considerable planar anisotropy but follow the same power-law regime, for both field orientations, arising within the conventional flux-creep theories in the whole field range. Very differently, however, the Tirr(H) lines of the doped superconductors exhibit besides large anisotropies, several different regimes. In fields lower than 8 kOe the Tirr(H) data of the doped samples display the de Almeida–Thouless (AT) and Gabay-Toulouse (GT)-like power-law behaviors, the signature of a frustrated superconductor. For higher-field values, and in particular for H||c, flux dynamics seems to be conventional. However, for H||ab and field values above 30 kOe, the flux dynamics displays sharp directional properties along the twinning planes (TP’s) for rotations about the c axis. This behavior is cusplike, comparable to that caused by columnar defects, which characterizes a Bose-flux-glass phase. We appoint the superconducting granularity and frustration as responsible for the AT and GT behaviors below 8 kOe and the strong anisotropic pinning for H parallel to the TP’s as the cause of the Bose-glass features. On the other hand, the isotropic pinning for large angular displacements or for any angle in fields below 30 kOe is the most probable cause of the vortex-glass features.application/pdfengPhysical review. B, Condensed matter and materials physics. Vol. 65, no. 14 (Apr. 2002), 144531, 9 p.Compostos de bárioAprisionamento de fluxoSupercondutores de alta temperaturaEfeito josephsonCompostos de estrôncioCompostos de ítrioAnisotropic irreversibility of the Abrikosov and Josephson flux dynamics in YBa/sub 2-x/Sr/sub x/Cu/sub 3/O/sub 7-[delta]/ single crystals : Bose-glass and vortex-glass featuresEstrangeiroinfo: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:UFRGSORIGINAL000314037.pdf000314037.pdfTexto completo (inglês)application/pdf168518http://www.lume.ufrgs.br/bitstream/10183/103926/1/000314037.pdfa3ee62668aef4ab4771179ae379260f9MD51TEXT000314037.pdf.txt000314037.pdf.txtExtracted Texttext/plain42199http://www.lume.ufrgs.br/bitstream/10183/103926/2/000314037.pdf.txt5ef8d561a71264ece2a95d6ef92c206eMD52THUMBNAIL000314037.pdf.jpg000314037.pdf.jpgGenerated Thumbnailimage/jpeg2017http://www.lume.ufrgs.br/bitstream/10183/103926/3/000314037.pdf.jpgdb85f53ee9ccde8108f0c6258e95c603MD5310183/1039262018-10-08 08:38:48.155oai:www.lume.ufrgs.br:10183/103926Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-08T11:38:48Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Anisotropic irreversibility of the Abrikosov and Josephson flux dynamics in YBa/sub 2-x/Sr/sub x/Cu/sub 3/O/sub 7-[delta]/ single crystals : Bose-glass and vortex-glass features |
title |
Anisotropic irreversibility of the Abrikosov and Josephson flux dynamics in YBa/sub 2-x/Sr/sub x/Cu/sub 3/O/sub 7-[delta]/ single crystals : Bose-glass and vortex-glass features |
spellingShingle |
Anisotropic irreversibility of the Abrikosov and Josephson flux dynamics in YBa/sub 2-x/Sr/sub x/Cu/sub 3/O/sub 7-[delta]/ single crystals : Bose-glass and vortex-glass features Vieira, Valdemar das Neves Compostos de bário Aprisionamento de fluxo Supercondutores de alta temperatura Efeito josephson Compostos de estrôncio Compostos de ítrio |
title_short |
Anisotropic irreversibility of the Abrikosov and Josephson flux dynamics in YBa/sub 2-x/Sr/sub x/Cu/sub 3/O/sub 7-[delta]/ single crystals : Bose-glass and vortex-glass features |
title_full |
Anisotropic irreversibility of the Abrikosov and Josephson flux dynamics in YBa/sub 2-x/Sr/sub x/Cu/sub 3/O/sub 7-[delta]/ single crystals : Bose-glass and vortex-glass features |
title_fullStr |
Anisotropic irreversibility of the Abrikosov and Josephson flux dynamics in YBa/sub 2-x/Sr/sub x/Cu/sub 3/O/sub 7-[delta]/ single crystals : Bose-glass and vortex-glass features |
title_full_unstemmed |
Anisotropic irreversibility of the Abrikosov and Josephson flux dynamics in YBa/sub 2-x/Sr/sub x/Cu/sub 3/O/sub 7-[delta]/ single crystals : Bose-glass and vortex-glass features |
title_sort |
Anisotropic irreversibility of the Abrikosov and Josephson flux dynamics in YBa/sub 2-x/Sr/sub x/Cu/sub 3/O/sub 7-[delta]/ single crystals : Bose-glass and vortex-glass features |
author |
Vieira, Valdemar das Neves |
author_facet |
Vieira, Valdemar das Neves Schaf, Jacob |
author_role |
author |
author2 |
Schaf, Jacob |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Vieira, Valdemar das Neves Schaf, Jacob |
dc.subject.por.fl_str_mv |
Compostos de bário Aprisionamento de fluxo Supercondutores de alta temperatura Efeito josephson Compostos de estrôncio Compostos de ítrio |
topic |
Compostos de bário Aprisionamento de fluxo Supercondutores de alta temperatura Efeito josephson Compostos de estrôncio Compostos de ítrio |
description |
Very detailed magnetic irreversibility data for fields applied along the c axis or the ab plane of a pure and untwinned YBa₂Cu₃O₇₋₈ single crystal and Sr-doped and heavily twinned YBa₂₋xSrxCu₃O₇₋₈ (x=0.25, 0.37, and 0.5) single crystals are reported. The irreversibility lines Tirr(H) of the pure single crystal show a considerable planar anisotropy but follow the same power-law regime, for both field orientations, arising within the conventional flux-creep theories in the whole field range. Very differently, however, the Tirr(H) lines of the doped superconductors exhibit besides large anisotropies, several different regimes. In fields lower than 8 kOe the Tirr(H) data of the doped samples display the de Almeida–Thouless (AT) and Gabay-Toulouse (GT)-like power-law behaviors, the signature of a frustrated superconductor. For higher-field values, and in particular for H||c, flux dynamics seems to be conventional. However, for H||ab and field values above 30 kOe, the flux dynamics displays sharp directional properties along the twinning planes (TP’s) for rotations about the c axis. This behavior is cusplike, comparable to that caused by columnar defects, which characterizes a Bose-flux-glass phase. We appoint the superconducting granularity and frustration as responsible for the AT and GT behaviors below 8 kOe and the strong anisotropic pinning for H parallel to the TP’s as the cause of the Bose-glass features. On the other hand, the isotropic pinning for large angular displacements or for any angle in fields below 30 kOe is the most probable cause of the vortex-glass features. |
publishDate |
2002 |
dc.date.issued.fl_str_mv |
2002 |
dc.date.accessioned.fl_str_mv |
2014-09-30T02:12:34Z |
dc.type.driver.fl_str_mv |
Estrangeiro 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://hdl.handle.net/10183/103926 |
dc.identifier.issn.pt_BR.fl_str_mv |
1098-0121 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000314037 |
identifier_str_mv |
1098-0121 000314037 |
url |
http://hdl.handle.net/10183/103926 |
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. Vol. 65, no. 14 (Apr. 2002), 144531, 9 p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRGS instname:Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
instname_str |
Universidade Federal do Rio Grande do Sul (UFRGS) |
instacron_str |
UFRGS |
institution |
UFRGS |
reponame_str |
Repositório Institucional da UFRGS |
collection |
Repositório Institucional da UFRGS |
bitstream.url.fl_str_mv |
http://www.lume.ufrgs.br/bitstream/10183/103926/1/000314037.pdf http://www.lume.ufrgs.br/bitstream/10183/103926/2/000314037.pdf.txt http://www.lume.ufrgs.br/bitstream/10183/103926/3/000314037.pdf.jpg |
bitstream.checksum.fl_str_mv |
a3ee62668aef4ab4771179ae379260f9 5ef8d561a71264ece2a95d6ef92c206e db85f53ee9ccde8108f0c6258e95c603 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS) |
repository.mail.fl_str_mv |
|
_version_ |
1798487262038589440 |