釔鋇銅氧高溫超導體添加銀的磁性研究

Abstract

本論文中，對於釔鋇銅氧高溫超導體添加銀的效應，我們分別以直流及交 流的磁化率來探討。直流磁化率中又分加磁場冷卻及冷卻後再加磁場兩個 過程。鍜燒後，塊材中晶粒大小及超導相的體積分率可由不同的銀含量及 鍜燒過程來決定o 在直流磁化率測量中，加磁場冷卻過程我們發現到順磁 邁斯納效應. The effect of silver doping on the field-cooled, zero-field- cooled magnetization and AC susceptibility of polycrystalline YBa2Cu3O7-x superconductors was investigated. The volume fraction and size of the superconducting grains in the sintered body were adjusted by doping various amount ofand sintering process.