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

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Babic, D. ; Bentner, J. ; Sürgers, C. ; Strunk, Christoph
Date of publication of this fulltext: 05 Aug 2009 13:58


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. ...


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