Current-driven transformations of the intermediate state patterns in type-I superconductors

Details Current-driven transformations of the intermediate state patterns in type-I superconductors Current-driven transformations of the intermediate state patterns in type-I superconductors

2008-06-27

arxiv.org/abs/0806.4608v1

Phys. Rev. B 78, 104511 (2008)

Physics

Condensed Matter

Superconductivity

video showing effect of transport current on the laminar structure can be found here: http://cmp.ameslab.gov/supermaglab/video

Scientific paper

10.1103/PhysRevB.78.104511

Dynamic structure of the intermediate state was studied in pinning-free thick Pb strips using real-time magneto-optical visualization. It is found that topological hysteresis can be lifted by applying sufficiently large current. Namely, laminar structure that appears on flux exit in a static case is turned into tubular when the sufficiently large transport current is present. Size and distribution of the flux tubes in static and dynamic regimes are different. Temperature, magnetic field and current phase diagram is discussed.

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