DISPLACEMENT WAVE OF THE TWEED STRUCTURE IN Y-BA-CU-O OXIDES

被引：59

作者：

ZHU, YM

SUENAGA, M

MOODENBAUGH, AR

机构：

[1] Department of Applied Science, Brookhaven National Laboratory, Upton, NY

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 1990年 / 62卷 / 01期

关键词：

D O I：

10.1080/09500839008203739

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new approach high-resolution electron microscopy combined with computerimaging techniques is used to delineate the distorted atomic configurations that underlie the tweed structure in Y-Ba-Cu-O oxides. It appears that the quasiperiodic shear displacements along [110] and [TlO] directions are directly responsible for both the tweed contrast observed under the two-beam condition and the streaking in diffraction. The modulation is associated with the presence of off-stoichiometric oxygen occurring either when the trivalent elements substitute for Cu in the chain site or when oxygen is removed from YBa2Cu3O7. © 1990 Taylor & Francis Group, LLC.

引用

页码：51 / 59

页数：9

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