Abstract
In this work we demonstrate (i) that on one hand active and passive superconducting thin-film devices can be used as very sensitive tools for detecting motion and penetration of vortices in superconducting material and (ii) that on the other hand the analysis of the local distribution of vortices in the devices can be used for optimization of device properties. Two candidates are discussed, i.e. the noise reduction in SQUIDs by means of strategically positioned antidots and the examination of the non-linear microwave behavior of coplanar superconducting resonators by means of flux and vortex penetration.
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