Anisotropic fluctuation magnetoconductivity in Bi2Sr2Ca2Cu3Ox thin films

Autor(en)

W. Lang

Abstrakt

Measurements of the fluctuation magnetoconductivity as a function of both the magnetic field up to 13 T and the temperature in thin films of Bi2Sr2Ca2Cu3Ox are presented. The variation of the magnetoconductivity with the magnetic field strength is quadratic at temperatures distantly above the critical temperature T-c and changes to an entirely negative curvature near T-c. The latter behavior is attributed to an inhomogeneous critical temperature in the films. The results are analyzed in terms of recent theoretical models for fluctuation-enhanced magnetoconductivity in layered superconductors. The magnetoconductivity in a magnetic field oriented normal to the copper-oxide layers is dominated by the orbital contribution of the Aslamazov-Larkin effect. The magnetoconductivity in the parallel orientation is distinctly smaller and provides evidence for the corresponding Zeeman contribution. The latter measurement also indicates that the Maki-Thompson process may be insignificant in Bi2Sr2Ca2Cu3Ox.

Organisation(en)

Elektronische Materialeigenschaften

Journal

Zeitschrift für Physik B - Condensed Matter

Band

97

Seiten

523-528

Anzahl der Seiten

6

ISSN

0722-3277

DOI

https://doi.org/10.1007/BF01322434

Publikationsdatum

1995

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/cb0a9a5b-cd54-4eb8-b80b-b12595628523