A variable temperature neutron diffraction study of the layered perovskite YBaMn2O5

被引：24

作者：

McAllister, JA

Attfield, JP

机构：

[1] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

[2] Univ Cambridge, Interdisciplinary Res Ctr Superconductiv, Cambridge CB3 0HE, England

来源：

JOURNAL OF MATERIALS CHEMISTRY | 1998年 / 8卷 / 05期

关键词：

D O I：

10.1039/a800605i

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A variable temperature neutron diffraction study has been carried out on the layered perovskite YBaMn2O5 between 100 and 300 K. A broad peak indexed as (1/2, 1/2, 1) on the nuclear cell is consistent with short range Mn-II/Mn-III valence ordering. The magnetic structure below the ferrimagnetic ordering temperature of 167 K has been determined and is in agreement with a previously proposed model. Changes in lattice parameters, bond lengths and angles show evidence of an exchange striction at T-C.

引用

页码：1291 / 1294

页数：4

共 10 条

[1] A ferrimagnetic manganese oxide with a layered perovskite structure: YBaMn2O5 [J].