This item still needs to be validated !
Title: Dimensional and flux lattice transitions in artificially layered superconductors
Authors: Bruynseraede, Yvan ×
Temst, Kristiaan
Osquiguil, E
Van Haesendonck, Christian
Gilabert, A
Schuller, Ik #
Issue Date: 1992
Publisher: Royal Swedish Academy of Sciences
Series Title: Physica Scripta T vol:T42 pages:37-45
Abstract: Artificially layered materials are ideal model systems to tune the dimensionality of the superconducting order as well as the structure of the flux line lattice. Our extensive studies of Pb/Ge multilayers indicate that the anisotropy of the upper critical field H(c2) strongly depends on the Ge separator thickness d(Ge). The dimensional crossover from D = 3 towards D = 2, which is revealed by an upturn in the temperature dependence of the parallel critical field H(c2)parallel-to, is also confirmed by the observed excess fluctuation conductivity above T(c). In samples for which D = 2 at all temperatures (d(Ge) > 50 angstrom), the structure of the flux line lattice for a perpendicular field H(perpendicular-to), can be probed by measuring the critical current density J(c). The variation of J(c)(H(perpendicular-to) exhibits an anomalous minimum, whose amplitude and position depend on d(Ge), the number of bilayers, temperature, and pinning strength. An interpretation in terms of either flux-lattice decoupling or melting is presented.
ISSN: 0281-1847
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
Nuclear and Radiation Physics Section
× corresponding author
# (joint) last author

Files in This Item:

There are no files associated with this item.

Request a copy


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science