THE STRUCTURE AND PROPERTIES OF BA2YCU3O6

被引：174

作者：

SANTORO, A ^{[1
]}

MIRAGLIA, S ^{[1
]}

BEECH, F ^{[1
]}

SUNSHINE, SA ^{[1
]}

MURPHY, DW ^{[1
]}

SCHNEEMEYER, LF ^{[1
]}

WASZCZAK, JV ^{[1
]}

机构：

[1] AT&T BELL LABS,MURRAY HILL,NJ 07974

来源：

MATERIALS RESEARCH BULLETIN | 1987年 / 22卷 / 07期

关键词：

BARIUM COMPOUNDS - Electronic Properties - CERAMIC MATERIALS - Low Temperature Properties - CRYSTALS - Structure - NEUTRONS - Diffraction - YTTRIUM COMPOUNDS - Electronic Properties;

D O I：

10.1016/0025-5408(87)90100-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structure of Ba//2YCu//3O//6 has been determined by neutron diffraction powder profile analysis. The cell is tetragonal P4/mmm with a equals 3. 8570(1)Angstrom and c equals 11. 8194(3)Angstrom. The cations are in a perovskite type arrangement, with Ba and Y ordered on the A site to give a cell tripled along c. The oxygens occupy only 2/3 of the perovskite anion sites and are ordered such that 1/3 of the Cu is two-fold coordinated and 2/3 is five-fold coordinated. This configuration can be derived from that of the superconductor Ba//2YCu//3O//7 by removing the oxygen atoms along the b axis at the (0,1/2,0) position. A pressed pellet exhibited semiconductivity with a band gap of 0. 21eV from 125-300K.

引用

页码：1007 / 1113

页数：107

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