Current-Density Dependence of the Vortex Pinning Energy in YBaCuO

Autor(en)

W. Lang, C. Fussenegger, P. Schwab, X.Z. Wang, D. Bauerle

Abstrakt

Measurements of the electrical resistivity, using pulsed currents of various magnitudes, in the mixed state of YBaCuO microbridges are reported. The onset of resistance follows a thermally activated behaviour of flux line motion. The dependence of the pinning potential barrier U on the current density j was investigated revealing two distinctly different regions. At moderate current densities j <10(4) A/cm2, no change of U upon current density was observed. We associate this behaviour with thermally assisted flux flow. At high current densities, U declines logarithmically, in accordance with the flux creep picture and a particular pinning potential well proposed by Zeldov et al.

Organisation(en)

Elektronische Materialeigenschaften

Journal

Physica B: Condensed Matter

Band

194

Seiten

1859-1860

Anzahl der Seiten

2

ISSN

0921-4526

DOI

https://doi.org/10.1016/0921-4526(94)91429-X

Publikationsdatum

1994

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/0b02a14b-c3b8-4f9c-b314-27768b200fc9