2009/06/01 by K.H. Kuit, J. R. Kirtley, J.R. Kirtley +6 · 1 citation
Physics and Astronomy · Engineering · #Physics of Superconductivity and Magnetism #Magnetic confinement fusion research #Superconducting Materials and Applications
paper · doi:10.1109/tasc.2009.2018080
Vortex trapping is investigated in thin-film strips of superconducting material. We present a model for the critical field above which vortex trapping occurs in these strips. This model includes the pairing energy of vortex-antivortex pairs in addition to the energy of single vortices. Experimental verification of the model with a scanning SQUID microscope shows very good agreement between the model and experiments on YBa2Cu3O7-deltaand Nb strips. Statistical analysis of the vortex distribution in the strips above the critical field has been performed and a comparison has been made between Nb and YBa2Cu3O7-deltafor the distributions in the lateral and longitudinal directions.