Irreversibility limits of the Abrikosov and Josephson flux dynamics in homogeneous and granular high-T/sub c/ superconductors
dc.contributor.author | Vieira, Valdemar das Neves | pt_BR |
dc.contributor.author | Silva Filho, Job Paim da | pt_BR |
dc.contributor.author | Schaf, Jacob | pt_BR |
dc.date.accessioned | 2014-09-26T02:10:50Z | pt_BR |
dc.date.issued | 2001 | pt_BR |
dc.identifier.issn | 1098-0121 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/103843 | pt_BR |
dc.description.abstract | 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. | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Physical review. B, Condensed matter and materials physics. Woodbury. Vol. 64, no. 9 (Sept. 2001), 094516 7p. | pt_BR |
dc.rights | Open Access | en |
dc.subject | Compostos de bário | pt_BR |
dc.subject | Supercondutores de alta temperatura | pt_BR |
dc.subject | Magnetização | pt_BR |
dc.subject | Compostos de estrôncio | pt_BR |
dc.subject | Compostos de ítrio | pt_BR |
dc.title | Irreversibility limits of the Abrikosov and Josephson flux dynamics in homogeneous and granular high-T/sub c/ superconductors | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000301990 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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