STRUCTURE-ANALYSIS OF GD2CUO4 - A NEW MODIFICATION OF THE T' PHASE

被引：70

作者：

BRADEN, M

PAULUS, W

COUSSON, A

VIGOUREUX, P

HEGER, G

GOUKASSOV, A

BOURGES, P

PETITGRAND, D

机构：

[1] KERNFORSCHUNGSZENTRUM KARLSRUHE,INFP,D-76021 KARLSRUHE,GERMANY

[2] PHILIPPS UNIV MARBURG,FACHBEREICH CHEM,D-35032 MARBURG,GERMANY

来源：

EUROPHYSICS LETTERS | 1994年 / 25卷 / 08期

关键词：

D O I：

10.1209/0295-5075/25/8/011

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Neutron diffraction on a single crystal of Gd2CuO4 shows a long-range superstructure of the T' phase. The oxygen squares surrounding the Cu sites are rotated around the c-axis (by an angle of 5.2-degrees at room temperature) leading to a reduced orthorhombic symmetry (space group: Acam). The reported structural deformation can explain previous results (weak ferromagnetism and Mossbauer effect) and might help to explain the non-existence of superconductivity in Gd2-xCeCuO4.

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页码：625 / 630

页数：6

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