caa a22 4500 445382740 CHVBK 20180317143022.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s10948-010-1053-9 doi (NATIONALLICENCE)springer-10.1007/s10948-010-1053-9 Asymmetry of the Pinning Force in Thin Nb Films in Parallel Magnetic Field [Elektronische Daten] [P. Bezotosny, S. Gavrilkin, A. Lykov, C. Attanasio, C. Cirillo, S. Prischepa] The pinning force, F p, is studied in Nb films of different thickness in parallel magnetic field H. The asymmetry in the magnetic field dependence of F p has been observed for two opposite directions of the transport current. The effect is less pronounced for thin and thick films where, respectively, single vortex pinning and pinning of the internal vortices, is relevant. At intermediate thickness, where the pinning mechanism is mostly caused by surface effects, an asymmetry in the F p(H) dependence is clearly visible. The different surface barriers that vortices should overcome to enter the sample from opposite sides of the film explain the effect, as confirmed by numerical calculations. These have been obtained by solving the Ginzburg-Landau equations with asymmetric boundary conditions which take into account the different superconducting properties of the film-substrate and film-vacuum interface. Such difference can also explain the reduction of the critical current usually observed in thin films as a function of their thickness. Springer Science+Business Media, LLC, 2010 Superconducting film nationallicence Asymmetry nationallicence Critical current nationallicence Boundary conditions nationallicence Bezotosny P. P.N. Lebedev Physical Institute RAS, Leninsky Prospekt 53, 119991, Moscow, Russia aut Gavrilkin S. P.N. Lebedev Physical Institute RAS, Leninsky Prospekt 53, 119991, Moscow, Russia aut Lykov A. P.N. Lebedev Physical Institute RAS, Leninsky Prospekt 53, 119991, Moscow, Russia aut Attanasio C. CNR-SPIN Salerno and Dipartimento di Fisica "E. R. Caianiello”, Università degli Studi di Salerno, 84084, Fisciano (Sa), Italy aut Cirillo C. CNR-SPIN Salerno and Dipartimento di Fisica "E. R. Caianiello”, Università degli Studi di Salerno, 84084, Fisciano (Sa), Italy aut Prischepa S. Belarus State University of Informatics and RadioElectronics, P. Browka Street 6, 220013, Minsk, Belarus aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/5(2011-07-01), 1553-1557 1557-1939 24:5<1553 2011 24 10948 https://doi.org/10.1007/s10948-010-1053-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-1053-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bezotosny P. P.N. Lebedev Physical Institute RAS, Leninsky Prospekt 53, 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Gavrilkin S. P.N. Lebedev Physical Institute RAS, Leninsky Prospekt 53, 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Lykov A. P.N. Lebedev Physical Institute RAS, Leninsky Prospekt 53, 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Attanasio C. CNR-SPIN Salerno and Dipartimento di Fisica "E. R. Caianiello”, Università degli Studi di Salerno, 84084, Fisciano (Sa), Italy aut NATIONALLICENCE 700 1- Cirillo C. CNR-SPIN Salerno and Dipartimento di Fisica "E. R. Caianiello”, Università degli Studi di Salerno, 84084, Fisciano (Sa), Italy aut NATIONALLICENCE 700 1- Prischepa S. Belarus State University of Informatics and RadioElectronics, P. Browka Street 6, 220013, Minsk, Belarus aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/5(2011-07-01), 1553-1557 1557-1939 24:5<1553 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer