Peak effect and surface crystal-glass transition for surface-pinned vortex arrayB. Plaçais1, N. Lütke-Entrup1, J. Bellessa1, P. Mathieu1, Y. Simon1 and E. B. Sonin2
1 Laboratoire Pierre Aigrain, Département de Physique de l'Ecole Normale Supérieure 24 rue Lhomond, 75005 Paris, France
2 Racah Institute of Physics, Hebrew University of Jerusalem - Jerusalem 91904, Israel
(Received 5 March 2004; accepted in final form 7 June 2004)
We present a theoretical and experimental study of the peak effect in the surface pinning of vortices. It is associated with a sharp transition in the vortex slippage length which we relate to a crossover from a weakly disordered crystal to a surface glass state. Experiments are performed on ion-beam-etched crystals. The slippage length is deduced from 1 -1 linear AC penetration depth measurements.
74.25.Qt - Vortex lattices, flux pinning, flux creep.
64.60.Cn - Order-isorder transformations; statistical mechanics of model systems.
© EDP Sciences 2004