Observation of the Granular Josephson Mechanism and the Vortex-Glass Transition in the Polycrystalline GdBa2Cu3O7- δ Superconductor.
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| Title: | Observation of the Granular Josephson Mechanism and the Vortex-Glass Transition in the Polycrystalline GdBa |
|---|---|
| Authors: | Vargas-Pineda, E. M.1 (AUTHOR), Rivera-Contreras, L. J.1 (AUTHOR), Pineda-Peña, G.1 (AUTHOR), Téllez, D. A. Landínez1 (AUTHOR), Roa-Rojas, J.1 (AUTHOR) jroar@unal.edu.co |
| Source: | Journal of Superconductivity & Novel Magnetism. Dec2024, Vol. 37 Issue 11/12, p1957-1963. 7p. |
| Subjects: | Superconducting transition temperature, High temperature superconductors, Josephson effect, Superconductors, Coherence (Physics) |
| Abstract: | The resistive transition between the normal and superconducting states in high critical temperature superconducting materials is characterized by the occurrence of two well-defined stages: a transition in the higher temperature thermal region called pairing transition and another known as coherence transition. In the presence of low magnetic fields, in the first transition, it is possible to identify a genuinely critical fluctuation regime, with Gaussian regimes. The Aslamazov-Larkin model in the 3D regime allows to analyze the amplitude of the order parameter, leading to the determination of parameters such as coherence length and critical field. In the coherence transition, the phase of the order parameter is the relevant quantity that varies between the grains of the system, leading to Josephson-type effects in the intergranular barriers due to the polycrystalline feature of this family of materials. The coherence transition for the sample GdBa2Cu3O7-δ under the application of seven different electric transport currents was studied in this work. The sample was produced by the solid-state reaction and the resistive behavior was determined to perform the paraconductivity analysis and characterizes granularity effects on the superconducting order parameter. A genuinely critical region characterized by dynamic critical exponent z = 4.5 was identified, similar to the value reported for the transition vortex glass – fluid. This paper proposes to identify three-dimensional Gaussian fluctuations in the paracoherent to get a coherence length associated with Josephson effects in the granular barrier and to find a factor related with the Josephson current in function of the seven applied currents. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Superconductivity & Novel Magnetism is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 181253941 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Observation of the Granular Josephson Mechanism and the Vortex-Glass Transition in the Polycrystalline GdBa<subscript>2</subscript>Cu<subscript>3</subscript>O<subscript>7- δ</subscript> Superconductor. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Vargas-Pineda%2C+E%2E+M%2E%22">Vargas-Pineda, E. M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rivera-Contreras%2C+L%2E+J%2E%22">Rivera-Contreras, L. J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pineda-Peña%2C+G%2E%22">Pineda-Peña, G.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Téllez%2C+D%2E+A%2E+Landínez%22">Téllez, D. A. Landínez</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Roa-Rojas%2C+J%2E%22">Roa-Rojas, J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jroar@unal.edu.co</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Superconductivity+%26+Novel+Magnetism%22">Journal of Superconductivity & Novel Magnetism</searchLink>. Dec2024, Vol. 37 Issue 11/12, p1957-1963. 7p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Superconducting+transition+temperature%22">Superconducting transition temperature</searchLink><br /><searchLink fieldCode="DE" term="%22High+temperature+superconductors%22">High temperature superconductors</searchLink><br /><searchLink fieldCode="DE" term="%22Josephson+effect%22">Josephson effect</searchLink><br /><searchLink fieldCode="DE" term="%22Superconductors%22">Superconductors</searchLink><br /><searchLink fieldCode="DE" term="%22Coherence+%28Physics%29%22">Coherence (Physics)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The resistive transition between the normal and superconducting states in high critical temperature superconducting materials is characterized by the occurrence of two well-defined stages: a transition in the higher temperature thermal region called pairing transition and another known as coherence transition. In the presence of low magnetic fields, in the first transition, it is possible to identify a genuinely critical fluctuation regime, with Gaussian regimes. The Aslamazov-Larkin model in the 3D regime allows to analyze the amplitude of the order parameter, leading to the determination of parameters such as coherence length and critical field. In the coherence transition, the phase of the order parameter is the relevant quantity that varies between the grains of the system, leading to Josephson-type effects in the intergranular barriers due to the polycrystalline feature of this family of materials. The coherence transition for the sample GdBa2Cu3O7-δ under the application of seven different electric transport currents was studied in this work. The sample was produced by the solid-state reaction and the resistive behavior was determined to perform the paraconductivity analysis and characterizes granularity effects on the superconducting order parameter. A genuinely critical region characterized by dynamic critical exponent z = 4.5 was identified, similar to the value reported for the transition vortex glass – fluid. This paper proposes to identify three-dimensional Gaussian fluctuations in the paracoherent to get a coherence length associated with Josephson effects in the granular barrier and to find a factor related with the Josephson current in function of the seven applied currents. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Superconductivity & Novel Magnetism is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s10948-024-06783-w Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 7 StartPage: 1957 Subjects: – SubjectFull: Superconducting transition temperature Type: general – SubjectFull: High temperature superconductors Type: general – SubjectFull: Josephson effect Type: general – SubjectFull: Superconductors Type: general – SubjectFull: Coherence (Physics) Type: general Titles: – TitleFull: Observation of the Granular Josephson Mechanism and the Vortex-Glass Transition in the Polycrystalline GdBa2Cu3O7- δ Superconductor. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Vargas-Pineda, E. M. – PersonEntity: Name: NameFull: Rivera-Contreras, L. J. – PersonEntity: Name: NameFull: Pineda-Peña, G. – PersonEntity: Name: NameFull: Téllez, D. A. Landínez – PersonEntity: Name: NameFull: Roa-Rojas, J. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 12 Text: Dec2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 15571939 Numbering: – Type: volume Value: 37 – Type: issue Value: 11/12 Titles: – TitleFull: Journal of Superconductivity & Novel Magnetism Type: main |
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