Anisotropic magnetoresistance in the normal state of oxygen-deficient YBa2Cu3O7-delta thin films induced by superconducting fluctuations

Autor(en)

W. Lang, W. Göb, W. Kula, R. Sobolewski

Abstrakt

We have investigated both the transverse and the longitudinal magnetoresistance of oxygen-deficient YBa2Cu3O7-delta thin films above their critical temperature T-c = 55 K. The magnetoresistance is solely caused by the magnetic-field suppression of superconducting order-parameter fluctuations, existing in the films up to 143 K, i.e. 2.6 T-c. The fluctuation effect provides a reliable determination of the Ginzburg-Landau coherence lengths, xi(ab) = 2.5nm and xi(c) = 0.09nm, with the anisotropy enhanced by oxygen depletion. No signature of the Maki-Thompson fluctuation process or a magnetoresistance resulting from the cyclotron motion of the normal-state quasiparticles was found.

Organisation(en)

Elektronische Materialeigenschaften

Journal

Zeitschrift für Physik B - Condensed Matter

Band

98

Seiten

453-456

Anzahl der Seiten

4

ISSN

0722-3277

DOI

https://doi.org/10.1007/BF01320845

Publikationsdatum

1995

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/56a17dd1-45bf-41b0-b01d-1f72346e0e9c