CRYSTAL-STRUCTURE OF (CU,C)BA2CA3CU4O11+DELTA (T-C=117K) BY NEUTRON-POWDER-DIFFRACTION ANALYSIS

被引：46

作者：

SHIMAKAWA, Y

JORGENSEN, JD

HINKS, DG

SHAKED, H

HITTERMAN, RL

IZUMI, F

KAWASHIMA, T

TAKAYAMAMUROMACHI, E

KAMIYAMA, T

机构：

[1] ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCONDUCT,ARGONNE,IL 60439

[2] NATL INST RES INORGAN MAT,TSUKUBA,IBARAKI 305,JAPAN

[3] UNIV TSUKUBA,INST MAT SCI,TSUKUBA,IBARAKI 305,JAPAN

[4] NEC CORP LTD,FUNDAMENTAL RES LABS,TSUKUBA,IBARAKI 305,JAPAN

[5] NUCL RES CTR NEGEV,DEPT PHYS,IL-84190 BEER SHEVA,ISRAEL

[6] BEN GURION UNIV NEGEV,DEPT PHYS,IL-84105 BEER SHEVA,ISRAEL

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.50.16008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The crystal structure of the newly discovered 117-K superconductor, (Cu,C)Ba2Ca3Cu4O11+, has been refined from time-of-flight neutron-powder- diffraction data. The structure has average tetragonal symmetry and is similar to that of Tl(or Hg)Ba2Ca3Cu4Oy. C atoms in CO3 groups substitute at the Cu site in the (Cu,C)O1+ layer leading to a chemical composition of (Cu0.68C0.32)Ba2Ca3Cu4O11.06. This compound has two inequivalent kinds of CuO2 layers with pyramidal and square coordination of Cu to oxygen. The inner CuO2 layers with Cu in four coordination are less corrugated than the outer ones with Cu in five coordination, and exhibit a structure very similar to those of infinite-layer compounds. © 1994 The American Physical Society.

引用

页码：16008 / 16014

页数：7

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