Thermally activated coherent vortex motion in YBa2Cu3O7-δ thin film microbridges

M.J.M.E. de Nivelle, G.J. Gerritsma, H. Rogalla

Research output: Contribution to journalArticleAcademicpeer-review

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Microbridges with dimensions smaller than the London penetration depth λ have been prepared in epitaxial YBaCu2O7-δ thin films by means of electron beam lithography. Typical peaks and kinks are observed in their differential resistance versus current characteristics which can be attributed to coherent flux motion. A vortex activation energy proportional to the inverse current 1/I is obtained. Both the current and the temperature dependence of the activation energy are consistent with the collective flux creep model if the dimensionality of the elastic vortex lattice equals 2.
Original languageEnglish
Pages (from-to)1525-1528
Number of pages4
JournalPhysical review letters
Issue number10
Publication statusPublished - 1993


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