Electrical Properties and Superconductivity of MSr2Nd2-xCexCu2O10-δ (M = Ta, Nb)
ZHU Yingjie, QIAN Yitai, LI Rukang, WANG Shiwei, CHEN Zuyao, CHEN Zhaojia*, WANG Nanling*, ZHOU Guien**
Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026
*Department of Physics, University of Science and Technology of China, Hefei 230026
**Laboratory of Structure And Element Analysis, University of Science and Technology of China, Hefei 230026
Electrical Properties and Superconductivity of MSr2Nd2-xCexCu2O10-δ (M = Ta, Nb)
Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026
*Department of Physics, University of Science and Technology of China, Hefei 230026
**Laboratory of Structure And Element Analysis, University of Science and Technology of China, Hefei 230026
Abstract：A new series of layered cuprate compounds MSr2Nd2-xCexCu2O10-δ (M = Ta,Nb) have been synthesized. The structure of the compounds is similar to that of Tl-1222. A peak in the R-T curve for the sample of TaSr2Nd1.3Ce0.7Cu2O10-δ has been observed at about 50K. For the sample of NbSr2Nd1.45Ce0.55Cu2O10-δ, metal-like conductivity behaviour has been observed. We have found superconductivity at about 13.2K in the samples of NbSr2Nd2-xCexCu2O10-δ ( x= 0.49, 0.50, 0.51, 0.52).
1992, Vol. 9 
