(B,CU)SR2YCU2O7, A NEW LAYERED COPPER-OXIDE BASED ON THE BORON-OXYGEN GROUP

被引：46

作者：

ZHU, WJ

YUE, JJ

HUANG, YZ

ZHAO, ZX

机构：

[1] National Laboratory for Superconductivity, Institute of Physics, Academia Sinica, Beijing

来源：

PHYSICA C | 1993年 / 205卷 / 1-2期

关键词：

Ceramic materials - Crystal structure - Superconductivity;

D O I：

10.1016/0921-4534(93)90176-Q

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

New layered copper-oxides (B,Cu)Sr2YCu2O7 with various boron contents have been synthesized. Their crystal structures resemble that of YBa2Cu3O7-delta, but contain boron-oxygen groups connecting (CuO2) sheets beside Y layers. (BxCu1-x) forms a solid solution with an approximate range of x = 0.1-0.9. The compound of idealized composition (B0.5Cu0.5)Sr2yCu2O7 crystallizes in the tetragonal space group P4/mmm (a = 3.818, c = 10.96 angstrom). Electrical resistivity measurements indicate metallic or semiconducting characteristics for samples with different boron contents. No superconducting transition was observed for these samples. In the (B0.5Cu0.5)Sr2-xBaYCu2O7 series, Ba doping at the Sr site induces superconductivity, with the optimum T(c) of 51 K for (B0.5Cu0.5)Sr0.8Ba1.2YCu2O7. These samples remain one single phase up to the Ba context x= 16.

引用

页码：118 / 122

页数：5

共 6 条

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