Study of vortex motion in a sintered high Tc superconductor by a vibrating reed technique

Using a vibrating reed technique in a subresonant excitation mode, dissipation mechanisms have been studied in sintered YBa2Cu307-, superconductors with different grain sizes. Experimental results are interpreted within the critical state model. Results deduced from vibrating reed technique are compared with ac susceptibility measurements. It is shown that both techniques give consistent result