【摘要】 适量Ｓｍ２ＢａＣｕＯ５（Ｓｍ２１１）的掺入改善了熔融织构ＹＢａ２Ｃｕ３Ｏｙ（ＭＴＧＹ１２３）的临界电流密度特性，并且在磁化曲线中出现第二峰现象（鱼尾现象）．在９５０℃进行高温处理后，第二峰消失，并且临界电流密度也降低了，其后的吸氧处理不能完全恢复后处理前的临界电流密度特性．这可能是因为形成了（Ｙ，Ｓｍ）１２３，且局域富Ｓｍ的（Ｙ，Ｓｍ）１２３中Ｓｍ代替Ｂａ形成低Ｔｃ相造成的．我们还对比了加及不加Ｓｍ２１１相样品的磁悬浮力及其随时间衰减行为．更多还原

【Abstract】 Abstract Melt textured growth YBa 2Cu 3O y (MTG Y123) with certain Sm 2BaCuO 5(Sm211) additions showed an improved critical current density characteristic and a second peak in the magnetization curve. The post annealing at 950℃ reduced the critical current density and eliminated the second peak. The followed oxygenation increased the critical current density again, but could not fully recover it. These might be connected with the formation of (Y,Sm)123 matrix with local low T c phase owing to the substitution of Sm for Ba sites in Sm rich regions. The magnetic levitation force and its decay with time were also tested and compared for with and without the Sm211 additions.更多还原