SYNTHESIS AND SUPERCONDUCTING PROPERTIES OF (TL1-XBIX)SR2CA2CU3O9

被引：20

作者：

SUBRAMANIAN, MA

GAI, PL

SLEIGHT, AW

机构：

[1] Central Research and Development Department E. I. Du Pont de Nemours, Company Experimental Station Wilmington

来源：

MATERIALS RESEARCH BULLETIN | 1990年 / 25卷 / 01期

关键词：

D O I：

10.1016/0025-5408(90)90168-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High temperature superconductors (Tl1-xBix)Sr2Ca2Cu3O9 have been prepared for x = 0.1 to 0.5 by solid state reactions in sealed gold tubes with Tc's in the range 115 to 120 K. They all have tetragonal unit cells (a ≈ 3.8 and c ≈ 15 Å) and are isostructural to TlBa2Ca2Cu3O9 and (Tl0.5Pb0.5)Sr2Ca2Cu3O9. Electron diffraction patterns of these compounds did not reveal any superstructure, which is common among Bi2Sr2Can-1CunO2n+4 superconductors. Variation of c lattice parameter with x and comparison of unit cell parameters of (Tl0.5Pb0.5)Sr2Ca2Cu3O9 with (Tl0.5Bi0.5)Sr2Ca2Cu3O9 suggests that formal oxidation state of Bi in the title compounds is close to or slightly above 3+. © 1990.

引用

页码：101 / 106

页数：6

共 12 条

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