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Flux-flow instabilities in amorphous Nb0.7Ge0.3 microbridges

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Babić, D. ; Bentner, J. ; Sürgers, C. ; Strunk, Christoph
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Date of publication of this fulltext: 05 Aug 2009 13:40


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 ${\approx}$70% of the upper critical magnetic field Bc2 and over a wide electric-field range. ...


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