We have investigated the superheating and the supercooling fields of a plan
ar array of tin cylinders with diameters ranging from 40 to 80 mum and thic
kness 8.3 mum evaporated onto a glass substrate and onto a kapton foil. Exp
erimental values of the Ginzburg-Landau parameter have been obtained and co
mpared with results from tin spheres. The spread of the superheating curves
is below 5%. (C) 2001 Elsevier Science B.V. All rights reserved.