A surface barrier for a vortex loop in type-II superconductors
- Inst. of Microstructure Physics, Nizhnii Novgorod (Russian Federation)
The magnetic field distribution, the magnetic flux, and the free energy of an Abrikosov vortex loop near the flat surface of a type-II superconductor are calculated in the London approximation. The vortex line of such a vortex is a half-circumference of arbitrary radius. The interaction between the vortex half-ring and an external uniform magnetic field applied along the surface is studied and the value of the energy barrier that hinders vortex expansion into the superconductor is found. Also discussed are mechanisms by which expanding vortex loops near the surface of the type-II superconductor form an equilibrium vortex line with a shape determined by the distribution of the applied magnetic field. 20 refs., 6 figs.
- OSTI ID:
- 274040
- Journal Information:
- Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 3 Vol. 81; ISSN JXTPAS; ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
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