On the Resistive State of Current-Carrying Rods of Type 2 Superconductors in Longitudinal Magnetic Fields

Abstract

The resistive state of the current-carrying type 2 superconducting rod in a longitudinal magnetic field was studied for Pb–Tl alloys. The herical structure composed of two kinds of domains was found from the measurement of the potential distribution on the sample surface. The larger domain was confirmed directly to be in a flux flow state and the other domain was estimated to be in a normal state by some theoretical considerations. The direction of the boundary between these domains was dependent only on the direction of magnetic field at the surface.