OXYGEN NONSTOICHIOMETRY IN THE (TL, PB)-SR-CA-CU-O 1212 SYSTEM

被引：24
|
作者：
OGBORNE, DM
WELLER, MT
机构：
[1] Department of Chemistry, The University of Southampton, Southampton
来源：
PHYSICA C | 1994年 / 220卷 / 3-4期
关键词：
D O I：
10.1016/0921-4534(94)90929-6
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Materials in the (Tl, Pb)Sr2CaCu2O7-delta system have been synthesised with different oxygen stoichiometries and their structure and superconducting properties studied. Powder neutron-diffraction studies reveal that for delta > 0 vacancies exist in the thallium-oxygen layer leading to an increase in the c lattice parameter, apical copper-oxygen bond and the inter-cuprate layer distance. These structural changes are discussed in relation to the superconducting properties and comparisons drawn to the double-thallium layer materials.
引用
收藏
页码：389 / 395
页数：7
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