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arXiv · 0809.2930

Vortex trapping and expulsion in thin-film type-II superconducting strips

K. H. Kuit·J. R. Kirtley·J. R. Clem·H. Rogalla·J. Flokstra
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Abstract

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-delta and 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-delta for the distributions in the lateral and longitudinal directions.

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K. H. Kuit, J. R. Kirtley, J. R. Clem, H. Rogalla, J. Flokstra. 2008-09-17. Vortex trapping and expulsion in thin-film type-II superconducting strips. https://doi.org/10.1109/tasc.2009.2018080

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