Issue 4, 2002
From the journal:

Journal of Materials Chemistry

A. J. Wright,a   H. M. Palmer,a   P. A. Andersona  and  C. Greaves*a  

* Corresponding authors

a School of Chemical Sciences, University of Birmingham, Birmingham, UK
E-mail: c.greaves@bham.ac.uk

Abstract

The crystal and magnetic structures of the two related phases, Sr2MnGaO5 and Ca2MnAlO5 are reported. Rietveld analysis of neutron powder diffraction has revealed that both phases adopt the brownmillerite structure. Subtle differences in structure lead to the structure of Sr2MnGaO5 being best described by the space group Icmm (a = 5.4888(2) Å, b = 16.2256(6) Å, c = 5.35450(2) Å at 2 K) while that of Ca2MnAlO5 is best described by Ibm2 (a = 5.46258(9) Å, b = 14.9532(3) Å, c = 5.23135(8) Å at 2 K). Low temperature neutron powder diffraction data show that both phases have a simple antiferromagnetic structure. However, magnetisation data suggest a more complex picture of the magnetic order within these phases.

Graphical abstract: Structures and magnetic ordering in the brownmillerite phases, Sr2MnGaO5 and Ca2MnAlO5

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Article information

DOI
https://doi.org/10.1039/B109865A
Article type
Paper
Submitted
29 Oct 2001
Accepted
14 Feb 2002
First published
05 Mar 2002

J. Mater. Chem., 2002,12, 978-982

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Structures and magnetic ordering in the brownmillerite phases, Sr2MnGaO5 and Ca2MnAlO5

A. J. Wright, H. M. Palmer, P. A. Anderson and C. Greaves, J. Mater. Chem., 2002, 12, 978 DOI: 10.1039/B109865A

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