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Vortex Nucleation in Thin Film of an Uniaxial Anisotropic Superconductor
Author(s) -
Krzysztoń T.
Publication year - 1991
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221650220
Subject(s) - condensed matter physics , vortex , nucleation , anisotropy , penetration depth , magnetic field , thin film , penetration (warfare) , superconductivity , materials science , surface energy , physics , mechanics , nanotechnology , optics , composite material , thermodynamics , quantum mechanics , engineering , operations research
In the framework of London theory the problem of vortex nucleation in a thin film of an anisotropic superconductor is studied. The Gibbs free energy of a vortex as a function of its distance from the surface of the film is calculated. This energy is considered as a surface barrier opposing penetration of the vortices into the film. The barrier disappears when a certain value of external magnetic field – the field of first penetration – is applied. The strength of this field is calculated as a function of an angle between the anisotropy axis and the direction of external magnetic field.