New ''02(n-1)n'' homologous series consisting of superconducting copper oxyhalide of the Sr-Ca-Cu-O-Cl system

被引：15

作者：

Wu, XJ

Jin, CQ

Laffez, P

Tatsuki, T

Tamura, T

Adachi, S

Yamauchi, H

Koshizuka, N

机构：

[1] Super. Conduct. Research Laboratory, Intl. Super. Conduct. Technol. Ctr., Tokyo 135, 10-13 Shinonome, 1-Chome, Koto-ku

[2] Institute of Physics, Chinese Academy of Sciences

[3] Surf. Supraconducteurs CNRDUPR5 E., 75231, Paris, 10, Rue Vauquelin

[4] Center for Ceramics Research, Tokyo Institute of Technology, Yokohama 226, Nagatsuda, Midori-ku

来源：

PHYSICA C | 1996年 / 258卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(95)00801-2

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A copper oxyhalide of the Sr-Ca-Cu-O-Cl system has been synthesized using a high-pressure synthesis technique. X-ray and electron-diffraction analyses and high-resolution transmission electron microscopic observation have revealed the formation of a homologous series, 02(n - 1)n, in this system. Depending on the synthesis condition, the sample containing the same phase can be superconducting or non-superconducting. The structural models for the members of this series are proposed. X-ray Rietveld refinement is performed for a nearly single-phase sample of (Sr,Ca)(3)Cu2O4+xCl2-y which shows superconductivity above 80 K. In these samples, it is considered that holes are introduced by the substitution of O2- for Cl- which are located at the apical site of pyramids with CuO2 basal plane.

引用

页码：143 / 152

页数：10