A note on magnetization of high temperature superconductors (YBCO, BSCCO) in mixed state

We present a critical study of the temperature and field dependence magnetization of high temperature superconductors (HTSCs). The controversial field dependence of dM/d ln B for YBa2Cu3O7 (YBCO) and Bi2Sr2CaCu2O8 (BSCCO) is discussed using different models. Moreover, for both the systems the magnetization (M(H)) dependence is compared with field (H) dependence.

► Vortex overlapping has a prominent role in magnetism.
► M(H) shows linear dependence with vortex overlapping mechanism for YBCO compound.
► Magnetization in the reversible region.
► Effective penetration depth due to vortex overlapping.