ATOMIC DISPLACEMENTS IN THE ORTHO-II PHASE OF YBA2CU3O6.50 BY SYNCHROTRON X-RAY-DIFFRACTION

被引：26

作者：

GRYBOS, J

HOHLWEIN, D

ZEISKE, T

SONNTAG, R

KUBANEK, F

EICHHORN, K

WOLF, T

机构：

[1] UNIV TUBINGEN,INST KRISTALLOG,TUBINGEN,GERMANY

[2] UNIV KARLSRUHE,INST KRISTALLOG,KARLSRUHE,GERMANY

[3] ITP,KERNFORSCHUNGSZENTRUM,KARLSRUHE,GERMANY

来源：

PHYSICA C | 1994年 / 220卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(94)90894-X

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

From an extended set of 346 observed superstructure reflections (227 symmetry independent) collected at a synchrotron radiation source, we were able to determine small antiferro-distortive displacements in the supercell 2a.b.c of the ortho-II phase of YBa2CU3O6.5O. Barium is displaced by 0.041(2) Angstrom and yttrium by 0.011(1) Angstrom along the a-axis. The apical oxygen atoms are shifted by +/- 0.026(4) Angstrom and the copper atoms in the superconducting plane by +/- 0.016(1) Angstrom along the c-axis relative to averaged positions. The displacements along the a-axis are explained by an electrostatic interaction model.

引用

页码：138 / 142

页数：5

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