Gaussian and three-dimensional-XY scalings and effects of disorder in the fluctuation magnetoconductivity of polycrystalline DyBa2Cu3O7-delta

Authors
Roa-Rojas, J Tellez, DAL Pureur, P
Citation
J. Roa-rojas et al., Gaussian and three-dimensional-XY scalings and effects of disorder in the fluctuation magnetoconductivity of polycrystalline DyBa2Cu3O7-delta, PHYS ST S-B, 220(1), 2000, pp. 513-516
Citations number
8
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA STATUS SOLIDI B-BASIC RESEARCH
ISSN journal
03701972 → ACNP
Volume
220
Issue
1
Year of publication
2000
Pages
513 - 516
Database
ISI
SICI code
0370-1972(200007)220:1<513:GATSAE>2.0.ZU;2-H
Abstract
Systematic measurements of the fluctuation magnetoconductivity in granular DyBa2Cu3O7-delta in magnetic fields up to 50 kOe are reported. Gaussian and critical scalings are observed in the normal state. In the Gaussian regime s, large intervals corresponding to low-dimensional fluctuations are eviden ced. Below T-c, in the regime describing the approach to the zero-resistivi ty state, the fluctuation conductivity diverges as expected in the coherenc e transition of mesoscopic granular superconductors in low magnetic fields.