Non-centro-symmetric superconductors Li2Pd3B and Li2(Pd0.8Pt0.2)3B: amplitude and phase fluctuation analysis of the experimental magnetization data
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional do INMETRO |
Texto Completo: | http://hdl.handle.net/10926/464 |
Resumo: | We report on magnetization data obtained as a function of temperature and magnetic field in Li2(Pd0.8Pt0.2)3B and Li2Pd3B non-centro-symmetric superconductors. Reversible magnetization curves were plotted as M1/2 versus T . This allows study of the asymptotic behavior of the averaged order parameter amplitude (gap) near the superconducting transition. Results of the analysis show, as expected, a mean field superconducting transition for Li2Pd3B. By contrast, a large deviation from the mean field behavior is revealed for Li2(Pd0.8Pt0.2)3B. This is interpreted as due to the strength of the non-s-wave spin-triplet pairing in this Pt-containing compound which produces nodes in the order parameter and, consequently, phase fluctuations. The diamagnetic signal above Tc(H) in Li2Pd3B is well explained by superconducting Gaussian fluctuations and agrees with the observed mean field transition. For Li2(Pd0.8Pt0.2)3B the diamagnetic signal above Tc(H) is much higher than the expected Gaussian values and appears to be well explained by three-dimensional critical fluctuations of the lowest-Landau-level type, which somehow agrees with the scenario of a phase mediated transition. |
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info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleNon-centro-symmetric superconductors Li2Pd3B and Li2(Pd0.8Pt0.2)3B: amplitude and phase fluctuation analysis of the experimental magnetization data20102010-11-04T16:48:11Z2010-11-04T16:48:11ZWe report on magnetization data obtained as a function of temperature and magnetic field in Li2(Pd0.8Pt0.2)3B and Li2Pd3B non-centro-symmetric superconductors. Reversible magnetization curves were plotted as M1/2 versus T . This allows study of the asymptotic behavior of the averaged order parameter amplitude (gap) near the superconducting transition. Results of the analysis show, as expected, a mean field superconducting transition for Li2Pd3B. By contrast, a large deviation from the mean field behavior is revealed for Li2(Pd0.8Pt0.2)3B. This is interpreted as due to the strength of the non-s-wave spin-triplet pairing in this Pt-containing compound which produces nodes in the order parameter and, consequently, phase fluctuations. The diamagnetic signal above Tc(H) in Li2Pd3B is well explained by superconducting Gaussian fluctuations and agrees with the observed mean field transition. For Li2(Pd0.8Pt0.2)3B the diamagnetic signal above Tc(H) is much higher than the expected Gaussian values and appears to be well explained by three-dimensional critical fluctuations of the lowest-Landau-level type, which somehow agrees with the scenario of a phase mediated transition.6 p. : il.Submitted by Bruna Fernandes (bruna.fernandes_farias@yahoo.com.br) on 2010-10-22T12:01:16Z No. of bitstreams: 1 2010_BadicaJrAlvarenga.pdf.pdf: 521041 bytes, checksum: 1b7f9afeb74c420e26f18c232b450602 (MD5)Approved for entry into archive by Catarina Soares(cfsoares@inmetro.gov.br) on 2010-11-04T16:48:11Z (GMT) No. of bitstreams: 1 2010_BadicaJrAlvarenga.pdf.pdf: 521041 bytes, checksum: 1b7f9afeb74c420e26f18c232b450602 (MD5)Made available in DSpace on 2010-11-04T16:48:11Z (GMT). No. of bitstreams: 1 2010_BadicaJrAlvarenga.pdf.pdf: 521041 bytes, checksum: 1b7f9afeb74c420e26f18c232b450602 (MD5) Previous issue date: 2010enghttp://hdl.handle.net/10926/464DMD_hdl_10926/464BADICA, P. et al. Non-centro-symmetric superconductors Li2Pd3B and Li2(Pd0.8Pt0.2)3B: amplitude and phase fluctuation analysis of the experimental magnetization data. Superconductor Science and Technology, v. 23, n. 10, 2010.Badica, PetreSalem-Sugui Júnior, SaidAlvarenga, Ana Paula Dornelles deJakob, G.info:eu-repo/semantics/openAccessreponame:Repositório Institucional do INMETROinstname:Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMETRO)instacron:INMETROBadica_2010.pdfhttp://xrepo01s.inmetro.gov.br/bitstream/10926/464/1/Badica_2010.pdfapplication/pdf521041http://xrepo01s.inmetro.gov.br/bitstream/10926/464/1/Badica_2010.pdf1b7f9afeb74c420e26f18c232b450602MD510926_464_1Badica_2010.pdf.txthttp://xrepo01s.inmetro.gov.br/bitstream/10926/464/6/Badica_2010.pdf.txttext/plain20919http://xrepo01s.inmetro.gov.br/bitstream/10926/464/6/Badica_2010.pdf.txt499f4a992cec9754edb1bdee0a364c3fMD510926_464_62024-06-10T15:24:21Zoai:xrepo01s.inmetro.gov.br:10926/464Repositório de Publicaçõeshttp://repositorios.inmetro.gov.br/oai/requestopendoar:2012-11-01T14:49:43Repositório Institucional do INMETRO - Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMETRO)false |
dc.title.none.fl_str_mv |
Non-centro-symmetric superconductors Li2Pd3B and Li2(Pd0.8Pt0.2)3B: amplitude and phase fluctuation analysis of the experimental magnetization data |
title |
Non-centro-symmetric superconductors Li2Pd3B and Li2(Pd0.8Pt0.2)3B: amplitude and phase fluctuation analysis of the experimental magnetization data |
spellingShingle |
Non-centro-symmetric superconductors Li2Pd3B and Li2(Pd0.8Pt0.2)3B: amplitude and phase fluctuation analysis of the experimental magnetization data Badica, Petre |
title_short |
Non-centro-symmetric superconductors Li2Pd3B and Li2(Pd0.8Pt0.2)3B: amplitude and phase fluctuation analysis of the experimental magnetization data |
title_full |
Non-centro-symmetric superconductors Li2Pd3B and Li2(Pd0.8Pt0.2)3B: amplitude and phase fluctuation analysis of the experimental magnetization data |
title_fullStr |
Non-centro-symmetric superconductors Li2Pd3B and Li2(Pd0.8Pt0.2)3B: amplitude and phase fluctuation analysis of the experimental magnetization data |
title_full_unstemmed |
Non-centro-symmetric superconductors Li2Pd3B and Li2(Pd0.8Pt0.2)3B: amplitude and phase fluctuation analysis of the experimental magnetization data |
title_sort |
Non-centro-symmetric superconductors Li2Pd3B and Li2(Pd0.8Pt0.2)3B: amplitude and phase fluctuation analysis of the experimental magnetization data |
author |
Badica, Petre |
author_facet |
Badica, Petre Salem-Sugui Júnior, Said Alvarenga, Ana Paula Dornelles de Jakob, G. |
author_role |
author |
author2 |
Salem-Sugui Júnior, Said Alvarenga, Ana Paula Dornelles de Jakob, G. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Badica, Petre Salem-Sugui Júnior, Said Alvarenga, Ana Paula Dornelles de Jakob, G. |
description |
We report on magnetization data obtained as a function of temperature and magnetic field in Li2(Pd0.8Pt0.2)3B and Li2Pd3B non-centro-symmetric superconductors. Reversible magnetization curves were plotted as M1/2 versus T . This allows study of the asymptotic behavior of the averaged order parameter amplitude (gap) near the superconducting transition. Results of the analysis show, as expected, a mean field superconducting transition for Li2Pd3B. By contrast, a large deviation from the mean field behavior is revealed for Li2(Pd0.8Pt0.2)3B. This is interpreted as due to the strength of the non-s-wave spin-triplet pairing in this Pt-containing compound which produces nodes in the order parameter and, consequently, phase fluctuations. The diamagnetic signal above Tc(H) in Li2Pd3B is well explained by superconducting Gaussian fluctuations and agrees with the observed mean field transition. For Li2(Pd0.8Pt0.2)3B the diamagnetic signal above Tc(H) is much higher than the expected Gaussian values and appears to be well explained by three-dimensional critical fluctuations of the lowest-Landau-level type, which somehow agrees with the scenario of a phase mediated transition. |
publishDate |
2010 |
dc.date.issued.fl_str_mv |
2010 |
dc.date.available.fl_str_mv |
2010-11-04T16:48:11Z |
dc.date.accessioned.fl_str_mv |
2010-11-04T16:48:11Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10926/464 DMD_hdl_10926/464 |
dc.identifier.citation.fl_str_mv |
BADICA, P. et al. Non-centro-symmetric superconductors Li2Pd3B and Li2(Pd0.8Pt0.2)3B: amplitude and phase fluctuation analysis of the experimental magnetization data. Superconductor Science and Technology, v. 23, n. 10, 2010. |
url |
http://hdl.handle.net/10926/464 |
identifier_str_mv |
DMD_hdl_10926/464 BADICA, P. et al. Non-centro-symmetric superconductors Li2Pd3B and Li2(Pd0.8Pt0.2)3B: amplitude and phase fluctuation analysis of the experimental magnetization data. Superconductor Science and Technology, v. 23, n. 10, 2010. |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.bitstream.fl_str_mv |
application/pdf text/plain |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional do INMETRO instname:Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMETRO) instacron:INMETRO |
instname_str |
Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMETRO) |
instacron_str |
INMETRO |
institution |
INMETRO |
reponame_str |
Repositório Institucional do INMETRO |
collection |
Repositório Institucional do INMETRO |
repository.name.fl_str_mv |
Repositório Institucional do INMETRO - Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMETRO) |
repository.mail.fl_str_mv |
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1801499965017554944 |