Paramagnetic effect at low and high magnetic fields in melt-textured YBa/sub 2/Cu/sub 3/O/sub 7-[delta]/
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/104298 |
Resumo: | We report on systematic field-cooled magnetization experiments in five different melt-textured YBa2Cu3O7 samples containing large amounts of Y2BaCuO5 precipitates. These composites were grown with the Bridgman or top-seeding techniques. Fields ranging from 1 Oe up to 50 kOe were applied either parallel or perpendicular to the Cu-O2 atomic planes. In the low field limit, we observed the paramagnetic Meissner effect (PME) in a Bridgman grown sample for the configuration where the field is oriented parallel to the Cu-O2 atomic planes. Contrasting with this unique observation at low fields, a paramagnetic response related to the superconducting state was observed in all of the studied samples when strong enough fields were applied in both orientations. This high-field paramagnetic effect shows some noticeable differences when compared to the most frequently reported PME at very low fields. In particular, the magnitude of the high-field paramagnetic moment increases when the field is augmented. Moreover, this effect shows a strong and anomalous relaxation, such that the paramagnetic moment increases as a function of the time. The anisotropy of the high-field paramagnetic moment depends on the sample microstructure, suggesting that pinning by the Y2BaCuO5 particles plays a crucial role in the explanation of this effect in the melt-processed YBa2Cu3O7 materials. |
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Dias, Fabio TeixeiraPureur Neto, PauloRodrigues Junior, PedroObradors, Xavier2014-10-09T02:13:07Z20041098-0121http://hdl.handle.net/10183/104298000513242We report on systematic field-cooled magnetization experiments in five different melt-textured YBa2Cu3O7 samples containing large amounts of Y2BaCuO5 precipitates. These composites were grown with the Bridgman or top-seeding techniques. Fields ranging from 1 Oe up to 50 kOe were applied either parallel or perpendicular to the Cu-O2 atomic planes. In the low field limit, we observed the paramagnetic Meissner effect (PME) in a Bridgman grown sample for the configuration where the field is oriented parallel to the Cu-O2 atomic planes. Contrasting with this unique observation at low fields, a paramagnetic response related to the superconducting state was observed in all of the studied samples when strong enough fields were applied in both orientations. This high-field paramagnetic effect shows some noticeable differences when compared to the most frequently reported PME at very low fields. In particular, the magnitude of the high-field paramagnetic moment increases when the field is augmented. Moreover, this effect shows a strong and anomalous relaxation, such that the paramagnetic moment increases as a function of the time. The anisotropy of the high-field paramagnetic moment depends on the sample microstructure, suggesting that pinning by the Y2BaCuO5 particles plays a crucial role in the explanation of this effect in the melt-processed YBa2Cu3O7 materials.application/pdfengPhysical review. B, Condensed matter and materials physics. Woodbury. Vol. 70, no. 22 (Dec. 2004), 224519 9p.FísicaParamagnetic effect at low and high magnetic fields in melt-textured YBa/sub 2/Cu/sub 3/O/sub 7-[delta]/Estrangeiroinfo: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:UFRGSORIGINAL000513242.pdf000513242.pdfTexto completo (inglês)application/pdf216984http://www.lume.ufrgs.br/bitstream/10183/104298/1/000513242.pdf219899d628388f8bcbfb91aa0c77ef99MD51TEXT000513242.pdf.txt000513242.pdf.txtExtracted Texttext/plain45190http://www.lume.ufrgs.br/bitstream/10183/104298/2/000513242.pdf.txt5b4e476bf349484ee5211ebdeb9ee35eMD52THUMBNAIL000513242.pdf.jpg000513242.pdf.jpgGenerated Thumbnailimage/jpeg1939http://www.lume.ufrgs.br/bitstream/10183/104298/3/000513242.pdf.jpg060773ed430e191213eca4d056c18faeMD5310183/1042982018-10-09 08:52:51.792oai:www.lume.ufrgs.br:10183/104298Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-09T11:52:51Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Paramagnetic effect at low and high magnetic fields in melt-textured YBa/sub 2/Cu/sub 3/O/sub 7-[delta]/ |
title |
Paramagnetic effect at low and high magnetic fields in melt-textured YBa/sub 2/Cu/sub 3/O/sub 7-[delta]/ |
spellingShingle |
Paramagnetic effect at low and high magnetic fields in melt-textured YBa/sub 2/Cu/sub 3/O/sub 7-[delta]/ Dias, Fabio Teixeira Física |
title_short |
Paramagnetic effect at low and high magnetic fields in melt-textured YBa/sub 2/Cu/sub 3/O/sub 7-[delta]/ |
title_full |
Paramagnetic effect at low and high magnetic fields in melt-textured YBa/sub 2/Cu/sub 3/O/sub 7-[delta]/ |
title_fullStr |
Paramagnetic effect at low and high magnetic fields in melt-textured YBa/sub 2/Cu/sub 3/O/sub 7-[delta]/ |
title_full_unstemmed |
Paramagnetic effect at low and high magnetic fields in melt-textured YBa/sub 2/Cu/sub 3/O/sub 7-[delta]/ |
title_sort |
Paramagnetic effect at low and high magnetic fields in melt-textured YBa/sub 2/Cu/sub 3/O/sub 7-[delta]/ |
author |
Dias, Fabio Teixeira |
author_facet |
Dias, Fabio Teixeira Pureur Neto, Paulo Rodrigues Junior, Pedro Obradors, Xavier |
author_role |
author |
author2 |
Pureur Neto, Paulo Rodrigues Junior, Pedro Obradors, Xavier |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Dias, Fabio Teixeira Pureur Neto, Paulo Rodrigues Junior, Pedro Obradors, Xavier |
dc.subject.por.fl_str_mv |
Física |
topic |
Física |
description |
We report on systematic field-cooled magnetization experiments in five different melt-textured YBa2Cu3O7 samples containing large amounts of Y2BaCuO5 precipitates. These composites were grown with the Bridgman or top-seeding techniques. Fields ranging from 1 Oe up to 50 kOe were applied either parallel or perpendicular to the Cu-O2 atomic planes. In the low field limit, we observed the paramagnetic Meissner effect (PME) in a Bridgman grown sample for the configuration where the field is oriented parallel to the Cu-O2 atomic planes. Contrasting with this unique observation at low fields, a paramagnetic response related to the superconducting state was observed in all of the studied samples when strong enough fields were applied in both orientations. This high-field paramagnetic effect shows some noticeable differences when compared to the most frequently reported PME at very low fields. In particular, the magnitude of the high-field paramagnetic moment increases when the field is augmented. Moreover, this effect shows a strong and anomalous relaxation, such that the paramagnetic moment increases as a function of the time. The anisotropy of the high-field paramagnetic moment depends on the sample microstructure, suggesting that pinning by the Y2BaCuO5 particles plays a crucial role in the explanation of this effect in the melt-processed YBa2Cu3O7 materials. |
publishDate |
2004 |
dc.date.issued.fl_str_mv |
2004 |
dc.date.accessioned.fl_str_mv |
2014-10-09T02:13:07Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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http://hdl.handle.net/10183/104298 |
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1098-0121 |
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000513242 |
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1098-0121 000513242 |
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http://hdl.handle.net/10183/104298 |
dc.language.iso.fl_str_mv |
eng |
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eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physical review. B, Condensed matter and materials physics. Woodbury. Vol. 70, no. 22 (Dec. 2004), 224519 9p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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