title: Velocimetry of superconducting vortices based on stroboscopic resonances.
abstract: An experimental determination of the mean vortex velocity in superconductors mostly relies on the measurement of flux-flow resistance with magnetic field, temperature, or driving current. In the present work we introduce a method combining conventional transport measurements and a frequency-tuned flashing pinning potential to obtain reliable estimates of the vortex velocity. The proposed device is characterized using the time-dependent Ginzburg-Landau formalism, where the velocimetry method exploits the resonances in mean vortex dissipation when temporal commensuration occurs between the vortex crossings and the flashing potential. We discuss the sensitivity of the proposed technique on applied current, temperature and heat diffusion, as well as the vortex core deformations during fast motion.
authors: Département de Physique, Université de Liège, Aleé du 6-Août 19, B-4000 Liège, Belgium.|Departement Fysica, Universiteit Antwerpen, Groenenborgerlaan 171, B-2020 Antwerpen, Belgium.
authors: Ž L
authors: ŽL
authors: Jelić
authors: Departement Fysica, Universiteit Antwerpen, Groenenborgerlaan 171, B-2020 Antwerpen, Belgium.
authors: M V
authors: MV
authors: Milošević
authors: Département de Physique, Université de Liège, Aleé du 6-Août 19, B-4000 Liège, Belgium.
authors: A V
authors: AV
authors: Silhanek