Effects of Yb-doping on flux pinning properties in YBa_2Cu_3O_(7-δ)  

作　　者：徐胜 顾艳妮 吴小山 

机构地区：[1]Jiangsu University of Science and Technology [2]Department of Physics,Nanjing University

出　　处：《Journal of Rare Earths》2010年第S1期431-433,共3页稀土学报（英文版）

基　　金：Project supported by the Program for Key Teachers in Jiangsu University of Science and Technology (37270901)

摘　　要：The effects of Yb-doping on the critical current density(Jc) and the critical temperature(Tc) in YBa2Cu3O7-δ(YBCO) were investigated.Rietveld refinements of X-ray diffraction showed that Yb3+ ions had partly substituted Y sites in YBCO and the unit cell volume V decreased monotonically as x increasing.Although Tc almost had no change with increasing Yb-concentration,the increase of Jc occurred as a field was applied and displayed a maximum at x=0.08.We argued that the formation of nanometric inhomogeneity may lead to the enhancement of pinning force.The effects of Yb-doping on the critical current density(Jc) and the critical temperature(Tc) in YBa2Cu3O7-δ(YBCO) were investigated.Rietveld refinements of X-ray diffraction showed that Yb3+ ions had partly substituted Y sites in YBCO and the unit cell volume V decreased monotonically as x increasing.Although Tc almost had no change with increasing Yb-concentration,the increase of Jc occurred as a field was applied and displayed a maximum at x=0.08.We argued that the formation of nanometric inhomogeneity may lead to the enhancement of pinning force.

关 键 词：YBA2CU3O7-Δ Yb-doping critical current density rare earths 

分 类 号：O731[理学—晶体学]