We report systematic measurements of the critical current versus magnetic field patterns of annular Josephson junctions in a wide magnetic field range. A modulation of the envelope of the pattern, which depends on the junction width, is observed. The data are compared with theory and good agreement is found.
@article{arxiv.cond-mat/9912302,
title = {Measurements of critical current diffraction patterns in annular Josephson junctions},
author = {Andreas Franz and Andreas Wallraff and Alexey V. Ustinov},
journal= {arXiv preprint arXiv:cond-mat/9912302},
year = {2009}
}