HYSTERETIC MAGNETIC-MOMENT OF YBA2CU3O7-DELTA - AN ANGULAR STUDY

The hysteretic magnetization of an YBa2Cu3O7-delta crystal containing a high density of Y2BaCuOx precipitates was investigated by two-axis, quasistatic, de magnetometry. As the off-axis applied magnetic field H was increased and the magnetization magnitude decreased, its orientat ion approached a direction near the crystalline c axis. The bulk persi stent currents J(p) predominately flowed parallel to the Cu-O planes f or a wide range of temperature and applied field. Even for H almost pe rpendicular to c, where the deduced irreversibility line maximized as commonly observed, the resulting magnetization was observed to be with in 15 degrees of [001].