Abstract:
In order to improve the trapped field of YBCO bulk, a single domain YBCO bulk was successfully fabricated, and the effects of the intensity and the magnetization time of pulsed magnetic fields on the trapped field have been investigated in detail.The result shows that the intensity of the trapped field in YBCO superconductor with the diameter of 20 mm may reach its maximum when the magnetic field with an optimal intensity(4.8 T) is applied.The trapped field increases significantly when the sample is magnetized for several times by the optimal magnetic field.Furthermore,the magnetization process is explained by Bean model.The results in this work helps to improve the magnetization efficiency of YBCO superconductors and understand the magnetization mechanism.
