Flux Flow Instabilities in Microstructured Amorphous Nb0.7Ge0.3 Thin Films

Thumbnail Image

Date

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Abstract

Description

We report measurements of the electric field vs. current density [E(J] characteristics in the mixed state of amorphous Nb0.7Ge0.3 microbridges. Close to the transition temperature Tc the Larkin-Ovchinnikov theory of nonlinear flux flow and the related instability describes the data quantitatively up to ~ 70% of the upper critical magnetic field Bc2 and over a wide electric field range. At lower temperatures the nonlinearities of E(J)can be described by electron heating which reduces Bc2 and leads to a second type of flux flow instability, as shown by a scaling analysis of the high-dissipation data.
4 pages, 4 figures

Keywords

Superconductivity

Citation

URI

http://salesiana.dossiersoluciones.com/handle/123456789/21847

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0307463
 http://arxiv.org/abs/cond-mat/0307463

Collections

arXiv