Fluctuation-induced conductivity in melt-textured Pr-doped YBa2Cu3O7-δ composite superconductor

Yuri Aparecido Opata, João Frederico Haas Leandro Monteiro*, Ezequiel Costa Siqueira, Pedro Júnior Rodrigues, Alcione Roberto Jurelo

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In this study, the effects of thermal fluctuations on the electrical conductivity in melt-textured YBa2Cu3O7-δ, Y0.95Pr0.05Ba2Cu3O7-δ and (YBa2Cu3O7-δ)0.95–(PrBa2Cu3O7-δ)0.05 composite superconductor were considered. The composite superconductor samples were prepared through the top seeding method using melt-textured NdBa2Cu3O7-d seeds. The resistivity measurements were performed with a low-frequency, low-current AC technique in order to extract the temperature derivative and analyze the influence of the praseodymium ion on the normal superconductor transition and consequently on the fluctuation regimes. The results show that the resistive transition is a two-step process. In the normal phase, above the critical temperature, Gaussian and critical fluctuation regimes were identified, while below the critical temperature, in the regime near the approach to the zero-resistance state, the fluctuation conductivity diverges as expected in a paracoherent-coherent transition.
Original languageEnglish
JournalPhase Transitions
Volume91
Issue number4
Pages (from-to)343-355
ISSN0141-1594
DOIs
Publication statusPublished - 2018

Cite this

Opata, Y. A., Monteiro, J. F. H. L., Siqueira, E. C., Rodrigues, P. J., & Jurelo, A. R. (2018). Fluctuation-induced conductivity in melt-textured Pr-doped YBa2Cu3O7-δ composite superconductor. Phase Transitions, 91(4), 343-355. https://doi.org/10.1080/01411594.2017.1402180
Opata, Yuri Aparecido ; Monteiro, João Frederico Haas Leandro ; Siqueira, Ezequiel Costa ; Rodrigues, Pedro Júnior ; Jurelo, Alcione Roberto. / Fluctuation-induced conductivity in melt-textured Pr-doped YBa2Cu3O7-δ composite superconductor. In: Phase Transitions. 2018 ; Vol. 91, No. 4. pp. 343-355.
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title = "Fluctuation-induced conductivity in melt-textured Pr-doped YBa2Cu3O7-δ composite superconductor",
abstract = "In this study, the effects of thermal fluctuations on the electrical conductivity in melt-textured YBa2Cu3O7-δ, Y0.95Pr0.05Ba2Cu3O7-δ and (YBa2Cu3O7-δ)0.95–(PrBa2Cu3O7-δ)0.05 composite superconductor were considered. The composite superconductor samples were prepared through the top seeding method using melt-textured NdBa2Cu3O7-d seeds. The resistivity measurements were performed with a low-frequency, low-current AC technique in order to extract the temperature derivative and analyze the influence of the praseodymium ion on the normal superconductor transition and consequently on the fluctuation regimes. The results show that the resistive transition is a two-step process. In the normal phase, above the critical temperature, Gaussian and critical fluctuation regimes were identified, while below the critical temperature, in the regime near the approach to the zero-resistance state, the fluctuation conductivity diverges as expected in a paracoherent-coherent transition.",
author = "Opata, {Yuri Aparecido} and Monteiro, {Jo{\~a}o Frederico Haas Leandro} and Siqueira, {Ezequiel Costa} and Rodrigues, {Pedro J{\'u}nior} and Jurelo, {Alcione Roberto}",
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Opata, YA, Monteiro, JFHL, Siqueira, EC, Rodrigues, PJ & Jurelo, AR 2018, 'Fluctuation-induced conductivity in melt-textured Pr-doped YBa2Cu3O7-δ composite superconductor', Phase Transitions, vol. 91, no. 4, pp. 343-355. https://doi.org/10.1080/01411594.2017.1402180

Fluctuation-induced conductivity in melt-textured Pr-doped YBa2Cu3O7-δ composite superconductor. / Opata, Yuri Aparecido; Monteiro, João Frederico Haas Leandro; Siqueira, Ezequiel Costa; Rodrigues, Pedro Júnior; Jurelo, Alcione Roberto.

In: Phase Transitions, Vol. 91, No. 4, 2018, p. 343-355.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Fluctuation-induced conductivity in melt-textured Pr-doped YBa2Cu3O7-δ composite superconductor

AU - Opata, Yuri Aparecido

AU - Monteiro, João Frederico Haas Leandro

AU - Siqueira, Ezequiel Costa

AU - Rodrigues, Pedro Júnior

AU - Jurelo, Alcione Roberto

PY - 2018

Y1 - 2018

N2 - In this study, the effects of thermal fluctuations on the electrical conductivity in melt-textured YBa2Cu3O7-δ, Y0.95Pr0.05Ba2Cu3O7-δ and (YBa2Cu3O7-δ)0.95–(PrBa2Cu3O7-δ)0.05 composite superconductor were considered. The composite superconductor samples were prepared through the top seeding method using melt-textured NdBa2Cu3O7-d seeds. The resistivity measurements were performed with a low-frequency, low-current AC technique in order to extract the temperature derivative and analyze the influence of the praseodymium ion on the normal superconductor transition and consequently on the fluctuation regimes. The results show that the resistive transition is a two-step process. In the normal phase, above the critical temperature, Gaussian and critical fluctuation regimes were identified, while below the critical temperature, in the regime near the approach to the zero-resistance state, the fluctuation conductivity diverges as expected in a paracoherent-coherent transition.

AB - In this study, the effects of thermal fluctuations on the electrical conductivity in melt-textured YBa2Cu3O7-δ, Y0.95Pr0.05Ba2Cu3O7-δ and (YBa2Cu3O7-δ)0.95–(PrBa2Cu3O7-δ)0.05 composite superconductor were considered. The composite superconductor samples were prepared through the top seeding method using melt-textured NdBa2Cu3O7-d seeds. The resistivity measurements were performed with a low-frequency, low-current AC technique in order to extract the temperature derivative and analyze the influence of the praseodymium ion on the normal superconductor transition and consequently on the fluctuation regimes. The results show that the resistive transition is a two-step process. In the normal phase, above the critical temperature, Gaussian and critical fluctuation regimes were identified, while below the critical temperature, in the regime near the approach to the zero-resistance state, the fluctuation conductivity diverges as expected in a paracoherent-coherent transition.

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