New 1222-Type Thallium-Indium Layered Cuprates (Tl, In)Sr2(Nd, Ce)2Cu2Oz and Their Superconductivity
CHEN Zuyao*, TANG Yongqiu**, Z. Z. Sheng, Y . F. Li, D. O. Pederson,
*Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026
**Analysis and Research Center, East China Institute of Chemical Technology, Shanghai 200237
Department of Physics, University of Arkansas, Fayetteville, A R 72701, USA
New 1222-Type Thallium-Indium Layered Cuprates (Tl, In)Sr2(Nd, Ce)2Cu2Oz and Their Superconductivity
CHEN Zuyao*;TANG Yongqiu**;Z. Z. Sheng;Y . F. Li;D. O. Pederson;
*Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026
**Analysis and Research Center, East China Institute of Chemical Technology, Shanghai 200237
Department of Physics, University of Arkansas, Fayetteville, A R 72701, USA
Abstract： A new series of 1222-type thallium-indium layered cuprate compounds (Tl, In)Sr2(Nd, Ce)2Cu2Oz have been successfully synthesized in the pure or nearly pure form and identified by powder x-ray diffraction analyses. The structure of the compounds is directly related to that of Nb-1222 NbSr2(Nd, Ce)2Cu2Oz, with a tetragonal body-center lattice. The lattice parameters are a=3.85Å, c=29.56Å for (Tl0.7ln0.3)Srz(Nd0.5Ce0.5)2Cu2Oz, and a=3.85Å, c=29.28Å for lnSr2(Nd0.75Ce0.25)2Cu2Oz. Resistance measurements showed that (T11-xInx)Sr2(Nd0.75Ce0.25)2Cu2Oz(x ≤ 0.8) are superconducting with Tc(onset)=30-40K .
CHEN Zuyao*;TANG Yongqiu**;Z. Z. Sheng;Y . F. Li;D. O. Pederson;. New 1222-Type Thallium-Indium Layered Cuprates (Tl, In)Sr2(Nd, Ce)2Cu2Oz and Their Superconductivity
[J]. 中国物理快报, 1993, 10(1): 49-52.
CHEN Zuyao*, TANG Yongqiu**, Z. Z. Sheng, Y . F. Li, D. O. Pederson,. New 1222-Type Thallium-Indium Layered Cuprates (Tl, In)Sr2(Nd, Ce)2Cu2Oz and Their Superconductivity
. Chin. Phys. Lett., 1993, 10(1): 49-52.
1993, Vol. 10 
