2008/06/14 by R. Prozorov, J. R. Hoberg · 1 citation
Physics and Astronomy · #cond-mat.supr-con
paper · pdf · doi:10.1088/1742-6596/150/5/052217
published as J. Phys.: Conf. Series 150, 052217 (2009) · to be presented at LT-25 (Amsterdam, 2008)
arxiv created 2008/06/14 · arxiv updated 2009/12/01
Structure of the intermediate state in type-I superconducting lead (Pb) is shown to be very sensitive to the ramp rate of an applied magnetic field. The configurations of resulting static patterns depend sensitively on the shape of the specimen. In particular, geometric barrier, present in the samples with rectangular cross-section, plays an important role in determining the sharp boundary between the phases of different topology. We propose that seemingly laminar (stripe) pattern obtained as a result of the fast field ramp is simply an imprint left behind by the fast-moving flux tubes. Our results confirm that flux tube phase is topologically favorable.