STUDY OF INTERFACES AND SURFACES OF YBa_2Cu_3O_(7-x)-Ag

摘要

Interfaces and surfaces of YBa2Cu3O7-x（YBCO）-Ag have been studied by SEM-EDXand AES.No effect of Ag on 123 structure in X-ray diffraction pattern was observedfor 0.4 mol Ag doped YBCO.AES analysis indicated that Ag segregated on surfaceof YBCO and resulted in decrease of YBCO-metal lead resistance.In addition,solutionand segregation of Ag as elemental state were often appeared on interfaces and surfacesof high temperature annealed YBCO,whether elemental Ag or compound Ag2O andAgNO3 adopted as doping material.