Sign change of the out-of-plane magnetoresistance in oxygen-deficient YBCO

Autor(en)

G. Heine, W. Lang, R. Rössler, J. D. Pedarnig, D. Bäuerle

Abstrakt

The out-of-plane magnetoresistance in optimally doped (T/sub c/ approximately=90 K) and oxygen-deficient (T/sub c/ approximately=58 K) thin films of YBa/sub 2/Cu/sub 3/O/sub 7- delta / grown on vicinal SrTiO/sub 3/ substrates was investigated. The magnetoresistance of both compounds changes sign above the critical temperature. The results are compared to theoretical predictions for the magnetic-field suppression, of superconducting order parameter fluctuations in anisotropic materials. It is suggested that the competition of Aslamazov-Larkin and density-of-states fluctuations, which contribute with different sign to the magnetoresistance, are responsible for the observed sign change.

Organisation(en)

Elektronische Materialeigenschaften

Journal

Journal of Low Temperature Physics

Band

117

Seiten

1265-1269

Anzahl der Seiten

5

ISSN

0022-2291

DOI

https://doi.org/10.1023/A:1022544322545

Publikationsdatum

1999

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/18dc6622-5533-40fd-aa9e-1065ef7809c8