STRUCTURAL STUDY OF SR2CUO3+DELTA BY NEUTRON POWDER DIFFRACTION

被引：70

作者：

SHIMAKAWA, Y

JORGENSEN, JD

MITCHELL, JF

HUNTER, BA

SHAKED, H

HINKS, DG

HITTERMAN, RL

HIROI, Z

TAKANO, M

机构：

[1] ARGONNE NATL LAB,DIV MAT SCI,IDAHO FALLS,ID 83401

[2] ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCONDUCT,IDAHO FALLS,ID 83401

[3] KYOTO UNIV,INST CHEM RES,UJI,KYOTO 611,JAPAN

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

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

来源：

PHYSICA C | 1994年 / 228卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0921-4534(94)90175-9

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Average crystal structures of superconducting Sr2CuO3+delta synthesized under high pressure and nonsuperconducting Sr2CuO3+delta synthesized at ambient pressure from a hydroxometallate precursor were refined from neutron powder diffraction data. A simplified model was used to fit the modulated superstructures. Both compounds have an oxygen-deficient La2CuO4-type tetragonal T structure with oxygen vacancies located in the Cu02 planes, not in the Sr2O2 layers. This result raises important questions regarding the nature of superconductivity in Sr2CuO3+delta reported to be a 70 K superconductor.

引用

收藏

页码：73 / 80

页数：8

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