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Gaussian and critical scalings in the magnetoconductivity fluctuations of Y3Ba5Cu8O18 superconductor
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Dias, F. T., Vieira, V. N., Oliveira, C. P., Silva, D. L., Mesquita, F., Lima, J. R., Wolff-Fabris, F., Kampert, Erik and Pureur, P. (2019) Gaussian and critical scalings in the magnetoconductivity fluctuations of Y3Ba5Cu8O18 superconductor. International Journal of Modern Physics B, 32 (32). 1850360. doi:10.1142/S0217979218503605
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WRAP-Gaussian-critical-scalings-magnetoconductivity-fluctuations-Kampert-2018.pdf - Accepted Version - Requires a PDF viewer. Download (1976Kb) | Preview |
Official URL: http://dx.doi.org/10.1142/S0217979218503605
Abstract
We have studied the superconducting transition and the magnetoconductivity fluctuations in the polycrystalline Y3Ba5Cu8O18 (Y358) superconductor under magnetic fields upto 1 T. A two-step superconducting transition could be observed as a consequence of the granular structure of the sample, which is strongly affected by the applied magnetic field. Gaussian and genuine critical 3D-XY-E fluctuation regimes were identified. A critical scaling regime beyond 3D-XY was identified for magnetic fields upto 0.25 T, corresponding to the averaged exponent 0.19 and suggesting the occurrence of the weak first-order character of the superconducting transition. In the approximation to the zero resistance a power law regime could be observed, corresponding to the averaged exponent 2.37, which are smaller than previously reported for the Y358 system. Our results are discussed in terms of the Y358 and YBa2Cu3O7−δ(Y123) results in the literature.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QC Physics | ||||||||
| Divisions: | Faculty of Science > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
| Library of Congress Subject Headings (LCSH): | Superconductors, Gaussian processes | ||||||||
| Journal or Publication Title: | International Journal of Modern Physics B | ||||||||
| Publisher: | World Scientific Publishing Co. Pte. Ltd. | ||||||||
| ISSN: | 0217-9792 | ||||||||
| Official Date: | 23 January 2019 | ||||||||
| Dates: |
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| Volume: | 32 | ||||||||
| Number: | 32 | ||||||||
| Article Number: | 1850360 | ||||||||
| DOI: | 10.1142/S0217979218503605 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Publisher Statement: | Electronic version of an article published as International Journal of Modern Physics B, 32, 32, 2018, 1850360 10.1142/S0217979218503605 © World Scientific Publishing Company https://www.worldscientific.com/worldscinet/ijmpb | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| RIOXX Funder/Project Grant: |
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