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Critical Fields in Layered Superconducting Systems
Author(s) -
Dobrosavljević L.
Publication year - 1973
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.2220550234
Subject(s) - perpendicular , superconductivity , isotropy , condensed matter physics , critical field , anisotropy , limiting , magnetic field , field (mathematics) , order (exchange) , physics , materials science , optics , geometry , mathematics , quantum mechanics , mechanical engineering , engineering , finance , pure mathematics , economics
Layered systems are considered which behave as single, but anisotropic superconductors. Supposing a second order transition in the presence of an external field, the critical fields H c2 and H c3 in the GL region are calculated. H c2 is a function of the angle θ between the magnetic field and the direction perpendicular to the layers; H c3 depends on θ in the same way as H c2 , the ratio H c3 / H c2 being the same as in the isotropic case ( H c3 / H c2 = 1.69). In the limiting case of thin layers it is found that H c2 is independent of the period of the layered structure, and is larger in the parallel (θ: π/2) then in the perpendicular (θ = 0) case.