HALL EFFECT IN NIOBIUM DOPED YBa_2Cu_3O_(7-y) SUPERCONDUCTOR  

作　　者：Jian MENG Yu Fang REN Xiao Guang LI 

机构地区：[1]Laboratory of Rare Earth Chemistry and Physics,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022

出　　处：《Chinese Chemical Letters》1993年第5期467-468,共2页中国化学快报(英文版)

基　　金：This project was supported by National Matural Science foundation of China.

摘　　要：YBa_2Cu_(3-x)Nb_xO_(7-y) superconductors have been prepared. XRD shows that the system remains orthorhombic for all composition. Substitution of Nb^(5+) for Cu^(2+) occurs in the Cu(2) sites. The introduction of the Nb^(5+) ions produces some extra free-electrons. These electrons recombine with the carriers of the system. It makes the mobility and the Hall number of YBa_2Cu_(3-x)Nb_xO_(7-y) decrease and also result in a depression in Tc.YBa_2Cu_(3-x)Nb_xO_(7-y) superconductors have been prepared. XRD shows that the system remains orthorhombic for all composition. Substitution of Nb^(5+) for Cu^(2+) occurs in the Cu(2) sites. The introduction of the Nb^(5+) ions produces some extra free-electrons. These electrons recombine with the carriers of the system. It makes the mobility and the Hall number of YBa_2Cu_(3-x)Nb_xO_(7-y) decrease and also result in a depression in Tc.

关 键 词：LI Cu HALL EFFECT IN NIOBIUM DOPED YBa2Cu3O SUPERCONDUCTOR 

分 类 号：O6[理学—化学]