NEW THALLIUM-LEAD BASED LAYERED CUPRATES AND THEIR SUPERCONDUCTIVITY

被引：7

作者：

CHEN, ZY

TANG, YQ

LI, YF

PEDERSON, DO

SHENG, ZZ

机构：

[1] UNIV SCI & TECHNOL CHINA, DEPT APPL CHEM, HEFEI 230026, PEOPLES R CHINA

[2] E CHINA INST CHEM TECHNOL, CTR ANAL & RES, SHANGHAI 200237, PEOPLES R CHINA

来源：

MATERIALS RESEARCH BULLETIN | 1992年 / 27卷 / 09期

关键词：

THALLIUM; LEAD; STRONTIUM; NEODYMIUM; CERIUM; CUPRATE; SUPERCONDUCTOR;

D O I：

10.1016/0025-5408(92)90243-S

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new series of 1222-type (Tl,Pb)-based layered cuprate compounds (Tl,Pb)Sr2(Nd,Ce)2Cu2Oz have been successfully synthesized in the 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 tetragonal body-center lattice. The lattice parameters are a = 3.855 angstrom, c = 29.47 angstrom for (Tl0.7Pb0.3)Sr2(Nd0.5Ce0.5)2Cu2Oz, and a = 3.853 angstrom, c = 29.61 angstrom for (Tl0.7Pb0.3)Sr2(Nd0.75Ce0.25)2Cu2Oz. Resistance measurements showed that (Tl1-xPbx)Sr2(Nd0.75Ce0.25)2Cu2Oz (x less-than-or-equal-to 0-6) prepared by the typical procedure exhibit superconductivity with Tc(onset) in the range 30-40 K.

引用

页码：1049 / 1055

页数：7

共 15 条

[11] SUPERCONDUCTIVITY ABOVE 100-K IN THE CA-FREE TL-PB-SR-PR-CU-O SYSTEM [J].