GEOMETRY EFFECT ON THE NONLINEAR MAGNETIC RESPONSE OF YBA2CU3O7-Y

Results are presented for study of nonlinear magnetization of a sinter ed YBa2Cu3O7-y pellet of different thickness of a sample subjected to very low magnetic field. On cooling the sample below T-c in sere field a change, in the oscillatory structure of harmonics in increasing de field is observed in very low ac magnetic field. The effect of finiten ess of the sample on the oscillatory structure and on the hysteresis o f harmonics is also studied. The results are explained qualitatively.