1/f flux flow noise due to a coexistence of qualitatively different vortex states

URN to cite this document:: urn:nbn:de:bvb:355-epub-80867
DOI to cite this document:: 10.5283/epub.8086

Babic, D. ; Bentner, J. ; Sürgers, C. ; Strunk, Christoph

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Date of publication of this fulltext: 05 Aug 2009 13:58

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Abstract

We investigate the vortex-motion voltage noise in a hybrid structure consisting of a weak-pinning amorphous Nb0.7Ge0.3 microbridge on top of which a strong-pinning, longitudinal Nb line with a narrow interruption in the middle is added. The Nb part enforces a branching of the applied current, causing a modulation of the current density within the Nb0.7Ge0.3, where vortex motion induces a voltage. ...