The crystal and magnetic structures of LaCa2Fe3O8 and NdCa2Fe3O8

Simple item page
dc.contributor.authorHudspeth, JMen_AU
dc.contributor.authorGoossens, DJen_AU
dc.contributor.authorStuder, AJen_AU
dc.contributor.authorWithers, RLen_AU
dc.contributor.authorNorén, Len_AU
dc.date.accessioned2009-06-22T01:33:59Zen_AU
dc.date.accessioned2010-04-30T05:04:14Zen_AU
dc.date.available2009-06-22T01:33:59Zen_AU
dc.date.available2010-04-30T05:04:14Zen_AU
dc.date.issued2009-03-25en_AU
dc.date.statistics2009-03-25en_AU
dc.description.abstractThe crystal and magnetic structures of LaCa2Fe3O8 and NdCa2Fe3O8 have been established using a combination of x-ray, neutron and electron diffraction. It was already considered likely that LaCa2Fe3O8 and NdCa2Fe3O8 were made up of stacked perovskite-like layers of FeO6 octahedra, with every third layer being replaced by a layer of tetrahedrally coordinated Fe, rather like a variation on the Brownmillerite (Ca2Fe2O5) structure type. We have gone further and determined a likely space group for this Grenier phase and determined the magnetic structure of the compounds at room temperature. The space group is found to be P2(1)ma (b axis as the long axis), and the crystal structure has been refined, subject to the stacking faulting along the long axis that is apparent in electron diffraction patterns. The magnetic structure of LaCa2Fe3O8 is shown to consist of antiferromagnetically ordered Fe3+ ions on a collinear G-type antiferromagnetic structure, with the magnetic moments most likely (anti) parallel with the c axis, and of magnitude 3.4 +/- 0.2 mu(B) (3.6 +/- 0.2 mu(B) for NdCa2Fe3O8). The result is reasonable given the magnetic structures of the end members of the La1-xCaxFeO3 series, LaFeO3 (x = 0) and Ca2Fe2O5 (x = 1). © 2009, Institute of Physicsen_AU
dc.identifier.articlenumber124206en_AU
dc.identifier.citationHudspeth, J. M., Goossens, D. J., Studer, A. J., Withers, R. L., & Norén, L. (2009). The crystal and magnetic structures of LaCa2Fe3O8 and NdCa2Fe3O8. Journal of Physics: Condensed Matter, 21(12), 8. doi:10.1088/0953-8984/21/12/124206en_AU
dc.identifier.govdoc1274en_AU
dc.identifier.issn0953-8984en_AU
dc.identifier.issue12en_AU
dc.identifier.journaltitleJournal of Physics: Condensed Matteren_AU
dc.identifier.pagination8en_AU
dc.identifier.urihttp://dx.doi.org/10.1088/0953-8984/21/12/124206en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1453en_AU
dc.identifier.volume21en_AU
dc.language.isoenen_AU
dc.publisherInstitute of Physicsen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectCrystal structureen_AU
dc.subjectMagnetic momentsen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectElectron diffractionen_AU
dc.subjectOxygenen_AU
dc.titleThe crystal and magnetic structures of LaCa2Fe3O8 and NdCa2Fe3O8en_AU
dc.typeJournal Articleen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.8 KB
Format:
Plain Text
Description:
Download
Collections
Journal Articles