The magnetization of Gd diffused YBa2Cu3O7-x is measured by a vibrating sample magnetometer （VSM） at selected temperatures （5, 25, 50, 77 K）. The experimental results for the magnetization are analyzed in the crit...The magnetization of Gd diffused YBa2Cu3O7-x is measured by a vibrating sample magnetometer （VSM） at selected temperatures （5, 25, 50, 77 K）. The experimental results for the magnetization are analyzed in the critical state framework involving Kim-Anderson field dependence Jc（H）=Jc0/（1＋｜H｜/H0）n of critical current density and equilibrium magnetization M eq . It is found that the inclusion of the equilibrium magnetization becomes more important at higher temperatures. At 77 K, the shape of the isothermal M-H hysteresis curve is governed by the equilibrium magnetization. Some superconducting parameters are determined by fitting the calculated curves to the experimental data.展开更多
文摘The magnetization of Gd diffused YBa2Cu3O7-x is measured by a vibrating sample magnetometer （VSM） at selected temperatures （5, 25, 50, 77 K）. The experimental results for the magnetization are analyzed in the critical state framework involving Kim-Anderson field dependence Jc（H）=Jc0/（1＋｜H｜/H0）n of critical current density and equilibrium magnetization M eq . It is found that the inclusion of the equilibrium magnetization becomes more important at higher temperatures. At 77 K, the shape of the isothermal M-H hysteresis curve is governed by the equilibrium magnetization. Some superconducting parameters are determined by fitting the calculated curves to the experimental data.
