NEW LAYERED COPPER OXIDES CONTAINING DOUBLE CUO2 SHEETS - CA3CU2O4CL2 AND CA3CU2O4BR2

被引：24

作者：

HUANG, J

HOFFMANN, RD

SLEIGHT, AW

机构：

[1] Department of Chemistry Oregon State University Corvallis

来源：

MATERIALS RESEARCH BULLETIN | 1990年 / 25卷 / 09期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0025-5408(90)90137-Q

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two new compounds, Ca3Cu2O4Cl2 and Ca3Cu2O4Br2, have been synthesized. The x-ray powder patterns of these compounds indicate tetragonal crystal structures with a = 3.861(1) A ̊ and c = 21.349(6) A ̊ for Ca3Cu2O4Cl2 and a = 3.8651(2) A ̊ and c = 23.620(1) A ̊ for Ca3Cu2O4Br2. These structures are closely related to those of the known compounds of the type A2CuO2X2 where A may be Ca or Sr and X may be Cl or Br. Electrical and magnetic properties of the new phases were evaluated. These phases contain the CuO2 sheets which generally give high-temperature superconductivity when the copper oxidation state is suitably adjusted. However, attempts to dope both the A2CuO2X2 and A3Cu2O4X2 phases to produce superconductivity have been unsuccessful. © 1990.

引用

页码：1085 / 1090

页数：6