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Title: Upper critical field of Pb films with an antidot lattice
Authors: Rosseel, E ×
Puig, T
Baert, M
Van Bael, Margriet
Moshchalkov, Victor
Bruynseraede, Yvan #
Issue Date: Aug-1997
Publisher: Elsevier science bv
Series Title: Physica c vol:282 pages:1567-1568
Abstract: We have studied the effect of lateral microstructuring on the upper critical field of superconducting Pb films with a square antidot lattice of period d, formed by square antidote with size a x a. The critical field was determined resistively by keeping the resistance at a fixed value while varying field and temperature. In low fields, the critical field curve demonstrates a cusp-like structure with cusps at integer and rational multiples of Phi(o)/d(2). At low fields, the periodicity is thus governed by the size of the lattice cell and corresponds to a superconducting wire network regime. In higher fields, the crossover from a ''collective'' to a ''single object'' behaviour is observed, characterized by oscillations with a period Phi(o)/a(2) coming from the formation of superconducting edge states around the antidots.
URI: 
ISSN: 0921-4534
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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