Magnetic and crystal structures of new layered perovskites Ca2FeMnO6-d (d = 0, 0.5, 1.0) with unusually high-valent cations

DOI

New layered perovskite compounds Ca2FeMnO6 and Ca2FeMnO5.5 were recently synthesized. Ca2FeMnO6 was obtained by low-temperature topotactic oxidation of brownmillerite-type Ca2FeMnO5 with layered Fe/Mn ordering. Ca2FeMnO5.5 was obtained by heating either Ca2FeMnO6 or Ca2FeMnO5.5 in air at 250-300 °C. The oxidation states of Fe/Mn are expected to vary as Ca2Fe3+Mn3+O5/ Ca2Fe3+Mn4+O5.5 / Ca2Fe4+Mn4+O6. The orderings of the B-site cations and oxygen vacancies in these compounds are of primary interest. It is also important to confirm the various valence states of Fe and Mn at the B sites. We request 4 days on WISH to follow the low-temperature evolution of the crystal structure and magnetic order in the new d = 0 and 0.5 materials and to compare with the δ = 1.0 parent. A standard 4-300 K CCR will be sufficient to record diffraction patterns of Ca2FeMnO6-d (d = 0, 0.5, 1.0).

Identifier
DOI https://doi.org/10.5286/ISIS.E.49911897
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/49911897
Provenance
Creator Miss Hannah Johnston; Mr Adam Watson; Dr Noriya Ichikawa; Professor Paul Attfield; Dr Yuichi Shimakawa; Dr Takashi Saito; Mr Yoshiteru Hosaka
Publisher ISIS Neutron and Muon Source
Publication Year 2017
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2014-05-07T23:00:00Z
Temporal Coverage End 2014-05-10T23:00:00Z