4 papers · 1 filter
Granularity and vortex dynamics in LaO_0.92F_0.08FeAs as probed by harmonics of the AC magnetic susceptibility
Maria G. Adesso, Danilo Zola, Jianlin Luo +6
Fundamental and higher harmonics of the AC magnetic susceptibility have been measured on a LaO_0.92F_0.08FeAs sample as a function of the temperature, at various amplitudes and fre…
A new method to detect the vortex glass phase and its evidence in YBCO
M G Adesso, M Polichetti, S Pace
The Vortex Glass phase has been unequivocally identified by analyzing the non linear magnetic response of type II superconductors. The method here introduced, more effective than t…
New aspects in the Bragg Glass-Disordered phase transition: an analysis based on the 3rd harmonics of the AC magnetic susceptibility
M. G. Adesso, R. Flukiger, T. Giamarchi +5
We analyse the phase transition between the Bragg Glass and the Disordered phase in the vortex lattice in type-II superconductors, both by analytical computations and experimental…
Low frequency transport measurements in GdSr2RuCu2O8
A. Vecchione, D. Zola, G. Carapella +4
Low frequency transport measurements are performed on GdSrRuCuO pellets. The observed current-voltage curves are qualitatively explained in the framework of a simple ph…