A NEUTRON-DIFFRACTION STUDY OF QUENCHED AND ANNEALED YBA2CU3O7-X (X=0.4,0.6,0.8)

被引：17

作者：

GREAVES, C

SLATER, PR

机构：

[1] Superconductivity Research Group, School of Chemistry, University of Birmingham, Birmingham

来源：

SOLID STATE COMMUNICATIONS | 1990年 / 74卷 / 07期

关键词：

D O I：

10.1016/0038-1098(90)90681-Z

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Oxygen vacancy ordering in YBa2Cu3O7-x has been examined using powder neutron diffraction. Samples of well defined stoichiometry, with 0.8#62;x#62;0.3, were prepared and subsequently quenched from high temperatures or annealed at low temperatures, using sealed tube techniques to maintain stoichiometry. Although no long range order was found in any sample, significant displacements of some o atoms were observed at low oxygen contents. A possible model consistent with such displacements is discussed. © 1990.

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页码：591 / 594

页数：4

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