Superconducting fluctuations: paraconductivity, excess Hall effect and magnetoconductivity in 2223-BiSrCaCuO thin films

Autor(en)

W. Lang, W. Kula, R. Sobolewski

Abstrakt

We report a detailed study of the influence of thermodynamic fluctuations of the superconducting order parameter on various normal-state transport properties in 2223-(Bi,Pb)SrCaCuO thin films at temperatures near the superconducting transition. Measurements of the electrical resistivity, the magnetoresistance and the Hall effect were analyzed with regard to fluctuation contributions, using theories for 2-dimensional, layered superconductors. We obtained a consistent set of parameters, which fit all magneto-transport measurements above 118 K, but observed a remarkable enhancement of both excess Hall effect and negative magnetoconductivity closer to T(C), whereas the zero-field fluctuation conductivity follows the theoretical predictions down to 110 K. No significant contributions from the indirect (Maki-Thompson) fluctuation process were found.

Organisation(en)

Elektronische Materialeigenschaften

Journal

Physica B: Condensed Matter

Band

194-196

Seiten

1643-1644

Anzahl der Seiten

2

ISSN

0921-4526

DOI

https://doi.org/10.1016/0921-4526(94)91321-8

Publikationsdatum

1994

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/ad6ff4cf-1e0f-40dc-bbb8-8e6c1c33b3ba