The University of Southampton
University of Southampton Institutional Repository

An unusual magnetic structure in Sr2FeO3F and magnetic structures of K2NiF4-type iron(III) oxides and oxide halides, including the cobalt substituted series Sr2Fe1-xCoxO3Cl

An unusual magnetic structure in Sr2FeO3F and magnetic structures of K2NiF4-type iron(III) oxides and oxide halides, including the cobalt substituted series Sr2Fe1-xCoxO3Cl
An unusual magnetic structure in Sr2FeO3F and magnetic structures of K2NiF4-type iron(III) oxides and oxide halides, including the cobalt substituted series Sr2Fe1-xCoxO3Cl
An unusual k = [1/2 1/2 1/2] magnetic structure is reported in Sr2FeO3F at low temperature. The magnetic structures of LaBaFeO4, LaSrFeO4, LaCaFeO4, Ca2FeO3Cl, Ca2FeO3Br, Sr2FeO3F, Sr2FeO3Cl, Sr2FeO3Br and solid solutions in the series Sr2Fe1-xCoxO3Cl have been examined and only Sr2FeO3F exhibits this structure. The La2CuO4-type spin arrangement dominates in all these phases, with antiferromagnetic ordering in the xy planes. The k = [1/2 1/2 1/2] magnetic phase in Sr2FeO3F occurs below 100 K and requires La2CuO4-type stacking across the SrO layers and La2NiO4-type stacking across the SrF layers. It has been possible to show that this phase grows in domains which have purely La2CuO4-type stacking at higher temperatures. In the Sr2Fe1-xCoxO3Cl series the La2CuO4-type magnetic structure in Sr2FeO3Cl and the La2NiO4-type structure in Sr2CoO3Cl coexist and structural and magnetic behaviour indicate phase segregation into cobalt- and iron-rich regions.
neutron-diffraction, crystal-structures, antiferromagnetism, mossbauer, ca2mno4, pr, cu
3093-3103
Hector, Andrew L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Knee, Christopher S.
de0aa2be-ddad-45dd-97f5-ae2f25de5207
MacDonald, Alexander I.
2e53f500-be9c-4c5b-be14-feac402d3bf0
Price, Daniel J.
479ee5e3-2626-4abe-bffa-679d77ba5192
Weller, Mark T.
36a60b56-049f-466c-a1d7-39d6b0d85ff4
Hector, Andrew L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Knee, Christopher S.
de0aa2be-ddad-45dd-97f5-ae2f25de5207
MacDonald, Alexander I.
2e53f500-be9c-4c5b-be14-feac402d3bf0
Price, Daniel J.
479ee5e3-2626-4abe-bffa-679d77ba5192
Weller, Mark T.
36a60b56-049f-466c-a1d7-39d6b0d85ff4

Hector, Andrew L., Knee, Christopher S., MacDonald, Alexander I., Price, Daniel J. and Weller, Mark T. (2005) An unusual magnetic structure in Sr2FeO3F and magnetic structures of K2NiF4-type iron(III) oxides and oxide halides, including the cobalt substituted series Sr2Fe1-xCoxO3Cl. Journal of Materials Chemistry, 15 (30), 3093-3103. (doi:10.1039/b505617a).

Record type: Article

Abstract

An unusual k = [1/2 1/2 1/2] magnetic structure is reported in Sr2FeO3F at low temperature. The magnetic structures of LaBaFeO4, LaSrFeO4, LaCaFeO4, Ca2FeO3Cl, Ca2FeO3Br, Sr2FeO3F, Sr2FeO3Cl, Sr2FeO3Br and solid solutions in the series Sr2Fe1-xCoxO3Cl have been examined and only Sr2FeO3F exhibits this structure. The La2CuO4-type spin arrangement dominates in all these phases, with antiferromagnetic ordering in the xy planes. The k = [1/2 1/2 1/2] magnetic phase in Sr2FeO3F occurs below 100 K and requires La2CuO4-type stacking across the SrO layers and La2NiO4-type stacking across the SrF layers. It has been possible to show that this phase grows in domains which have purely La2CuO4-type stacking at higher temperatures. In the Sr2Fe1-xCoxO3Cl series the La2CuO4-type magnetic structure in Sr2FeO3Cl and the La2NiO4-type structure in Sr2CoO3Cl coexist and structural and magnetic behaviour indicate phase segregation into cobalt- and iron-rich regions.

Full text not available from this repository.

More information

Published date: 1 June 2005
Keywords: neutron-diffraction, crystal-structures, antiferromagnetism, mossbauer, ca2mno4, pr, cu

Identifiers

Local EPrints ID: 20820
URI: http://eprints.soton.ac.uk/id/eprint/20820
PURE UUID: 1cde1a43-3a85-4759-a56d-9433e0c1ee3c
ORCID for Andrew L. Hector: ORCID iD orcid.org/0000-0002-9964-2163

Catalogue record

Date deposited: 03 Mar 2006
Last modified: 07 Oct 2020 01:39

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×