NEW SERIES OF OXYSULFATE SUPERCONDUCTORS (CU0.5S0.5)SR2CAN-1CUNOY (N=3-7), PREPARED AT HIGH-PRESSURE

被引：22

作者：

TAKAYAMAMUROMACHI, E ^{[1
]}

MATSUI, Y ^{[1
]}

RAMIREZCASTELLANOS, J ^{[1
]}

机构：

[1] UNIV TSUKUBA,INST APPL PHYS,TSUKUBA,IBARAKI 305,JAPAN

来源：

PHYSICA C | 1995年 / 252卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(95)00472-6

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A new series of oxysulphate superconductors, (Cu0.5S0.5)Sr2Can-1CunOy was prepared at high pressure of 6 GPa and 1250 degrees C. Five members with n = 3-7 were obtained in bulk. They show superconductivity with T-c ranging from similar to 60 K for n = 7 to 100 K for n = 3. HRTEM and electron diffraction observation for each member indicated an ordered arrangement of Cu and S in a (Cu,S) plane resulting in a superstructure with a(s) = 2a, b(s) = b, c(s) = 2c or a(s) = 2s, b(s) = b, c(s) = c with respect to a basic tetragonal lattice, a, b, c. Local intergrowths of phases with various n values up to 13 were also observed.

引用

页码：221 / 228

页数：8

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