| Magnetic measurements have been conducted on {dollar}rm Ysb1Basb2Cusb3Osb7{dollar}/(Ag{dollar}sb2{dollar}O){dollar}sb{lcub}x{rcub}{dollar} for x ranging between 0% and 50% weight ratio. The major quantities which were under the scope of this project are: the critical current density J{dollar}sb{lcub}c{rcub}{dollar}, pinning force F{dollar}sb{lcub}p{rcub}{dollar} and the energy loss W. The temperature and field dependance of the critical current densities, pinning forces and energy losses of {dollar}rm Ysb1Basb2Cusb3Osb7{dollar}/(Ag{dollar}sb2{dollar}O){dollar}sb{lcub}x{rcub}{dollar} system were investigated in this study.; The addition of (Ag{dollar}sb2{dollar}O){dollar}sb{lcub}x{rcub}{dollar} with {dollar}rm xle 10%{dollar} was found to increase J{dollar}sb{lcub}c{rcub}{dollar} and F{dollar}sb{lcub}p{rcub},{dollar} while for x {dollar}>{dollar} 10% a reduction in both values have been found at all temperature studied. At x = 50%, however the sample even though is still superconducting, but have a deteriorated magnetic properties, with a very low critical current density. For all samples in this study, the energy loss has been found to strongly depend on the magnetic field at low fields, while it reaches saturation for fields above the full penetration field.; The contribution to the energy loss due to the trapped flux and due to the diamagnetism, decreases strongly with temperature. The loss is mostly diamagnetic at high temperatures {dollar}>{dollar}30K, while at {dollar}<{dollar}30K both (diamagnetic and trapped) flux lines contribute to the dissipation of energy. |
