Nb^(5+)掺杂对低氟MOD法制备的YBCO薄膜性能的影响  

Effect of Nb^(5+)-doped YBCO Film Synthesized by Low-fluorine MOD Method

作　　者：毛磊[1] 索红莉[1] 刘敏[1] 张子立[1] 叶帅[1] 马麟[1] 

机构地区：[1]北京工业大学国家教育部功能材料重点实验室,北京100022

出　　处：《无机材料学报》2013年第9期956-960,共5页Journal of Inorganic Materials

基　　金：国家自然科学基金(51171002);北京市自然科学基金;北京市教育委员会科技计划重点项目(KZ201310005003);中央财政支持地方高校建设专项资金;211计划专项资金~~

摘　　要：本研究通过低氟MOD法成功地制备了Nb5+掺杂的YBa2Cu3O7-x(YBCO)薄膜,Nb5+在薄膜中生成了大小在20~30 nm之间的纳米颗粒;纳米颗粒的生成不会对YBCO薄膜的织构和临界温度(Tc)构成明显的影响。由于纳米颗粒的引入,掺杂后薄膜的临界电流密度(Jc)在整个磁场范围内都要高于纯的YBCO,自场下的Jc更是达到了3.4 MA/cm2。掺杂薄膜的钉扎力(Fp)也远远大于纯YBCO,最大钉扎力达到了3.25 GN/m3,有效地提高了YBCO在外加磁下的超导性能。Nb5＋-doped YBCO film was fabricated successfully by low-fluorine metal organic deposition （MOD） method. The effective pinning centers in doped film are attributed to Nb-containing nanoparticles with the size of 20-30 nm. Meas- urement results show that the texture and critical temperature of the doped film are not influenced obviously by the nanopar- titles. In addition, a significant enhancement of J~ is observed for YBCO films with nanoparticles compared to that of pure YBCO film by the field dependence of Jc values. The self-field critical current density reaches as high as 3.4 MA/cm2, and the peak pinning force （Fp） of the doped film is greatly increased than the pure one, which reaches at 3.25 GN/m3.

关 键 词：YBCO薄膜 掺杂 低氟MOD法 双钙钛矿结构纳米颗粒 场性能 

分 类 号：TQ174[化学工程—陶瓷工业]