TETRAGONAL YBA2(CU1-XMX)3O7+DELTA, M = FE, CO, AL, TWEED CONTRAST AND ORTHORHOMBIC MICROTWINS

被引：7

作者：

SKJERPE, P ^{[1
]}

OLSEN, A ^{[1
]}

TAFTO, J ^{[1
]}

SUENAGA, M ^{[1
]}

ZHU, Y ^{[1
]}

MOODENBAUGH, AR ^{[1
]}

机构：

[1] BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973

来源：

PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES | 1992年 / 65卷 / 05期

关键词：

D O I：

10.1080/13642819208217921

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Calculations predict that orthorhombic microtwins of the same orthorhombicity as pure YBa2Cu3O7-delta result in an apparent tetragonal symmetry in diffraction experiments when the twin period is reduced below about 20 nm. The diffuse electron scattering observed around the fundamental reflections from YBa2(CU1-xMx)3O7+delta, where M=Fe, Al, or Co and x greater-than-or-similar-to 0.03, is also well described by this model of non-periodic orthorhombic microtwins, suggesting that these trivalent cations on the chain sites promote the formation of chemical twins.

引用

页码：1067 / 1077

页数：11

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