Fluxonic Properties of Vortices in a Washboard Pinning Potential Fabricated by Focused Particle Beam Techniques

O.V. Dobrovolskiya, M. Hutha and V.A. Shklovskijb, c aPhysikalisches Institut, Goethe-University, 60438 Frankfurt am Main, Germany bInstitute of Theoretical Physics, NSC-KIPT, 61108 Kharkiv, Ukraine cPhysical Department, Kharkiv National University, 61077 Kharkiv, Ukraine

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A challenging aspect of the usage of patterned nanostructures relates to the development of superconducting devices operating with the Abrikosov vortices in some pinning potential. To provide such a potential we have used thin epitaxial films of Nb with washboard-like nanostructures in the form: of grooves or Co stripes. The nanostructures were prepared by focused ion beam milling or focused electron beam induced deposition, respectively. The results of transport measurements affirm the existence of two fluxonic effects, the guided vortex motion and the vortex ratchet effect, both invoked by the nanostructuring. In particular, the effects represent the basis for the development of advanced fluxonic devices using a directional or orientational control of the net vortex motion in Nb films nanostructured by focused particle beam techniques.

DOI: 10.12693/APhysPolA.121.82 PACS numbers: 74.25.F-, 74.25.Wx, 74.25.Sv