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DOI: 10.1039/A800605I (Paper) Reference Section for: J. Mater. Chem., 1998, 8, 1291-1294

A variable temperature neutron diffraction study of the layered perovskite YBaMn2O5

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Judith A. Mcallister and J. Paul Attfield

Abstract

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 MnII /MnIII 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 TC .

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