Constraints on the possible long-range orbital ordering in LaCoO3

被引：3

作者：

Phelan, D. ^{[1
]}

机构：

[1] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2014年 / 350卷

关键词：

Crystal structure; Cobaltite; Neutron diffraction; Jahn-Teller; Orbital ordering; Spin-state; STATE;

D O I：

10.1016/j.jmmm.2013.09.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A neutron powder diffraction measurement was performed to distinguish between the proposed monoclinic (12/a) structure of LaCoO3, which is consistent with orbital ordering, and the rhombohedral (R (3) over barc) structure, which is inconsistent with orbital ordering. These two structures were differentiated through a measurement of a superlattice reflection with a d-spacing of approximately 4.43 angstrom which is only generated by 12/a. This reflection was not observed, and instead a restrictive upper bound was placed on its structure factor. The data is inconsistent with the monoclinic structure and suggests that there may be no long-range Jahn-Teller distortion in LaCoO3. Published by Elsevier B.V.

引用

页码：183 / 187

页数：5

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