Abstract
The magnetic and electrical properties of polycrystalline YBaCuO prepared by sintering various size of powders were examined by DC four-probe method and vibrating sample magnetometer(VSM). As magnetic properties, initial magnetic curves and hysteresis curves were measured and gradients of initial magnetic curves were calculated. Effects of shielding magnetic field were studied with YBaCuO pellets of 1 inch in diameter and 1 mm in thickness by hall generator(F.W.BELL) at DC magnetic field bellow 200 gauss. Increasing magnetic field, shielding was broken at about 20 gauss and transmitted magnetic field was constantly from 20 to 30 gauss less than applied magnetic field above 20 gauss. But transmitted magnetic field decreased as the value of magnetization increased. It may be concluded that shielding effect is dependent on magnetization rather than critical current density at low magnetic field.
