Reference : Local mapping of dissipative vortex motion
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Local mapping of dissipative vortex motion
Raes, B [Katholieke Universiteit Leuven - KUL > > > >]
Van de Vondel, J [Katholieke Universiteit Leuven - KUL > > > >]
Silhanek, Alejandro mailto [Université de Liège - ULiège > Département de physique > Physique de la matière condensée >]
Souza Silva, C [Universidade Federal de Pernambuco, Brazil > > > >]
Gutierrez, J [Katholieke Universiteit Leuven - KUL > > > >]
Kramer, R [Institute Néel, Grenoble > > > >]
Moshchalkov, V [Katholieke Universiteit Leuven - KUL > > > >]
Physical Review. B : Condensed Matter
American Institute of Physics
Yes (verified by ORBi)
New York
[en] superconductivity
[en] We explore, with unprecedented single vortex resolution, the dissipation and motion of vortices in a superconducting ribbon under the influence of an external alternating magnetic field. This is achieved by combining the phase sensitive character of ac susceptibility, allowing us to distinguish between the inductive and dissipative responses, with the local power of scanning Hall probe microscopy. Whereas the induced reversible screening currents contribute only inductively, the vortices do leave a fingerprint in the out-of-phase component. The observed large phase-lag demonstrates the dissipation of vortices at time scales comparable to the period of the driving force (i.e., 13 ms). These results indicate the presence of slow microscopic loss mechanisms mediated by thermally activated hopping transport of vortices between metastable states.

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