Structural and magnetic characterization in a honeycomb Ca2Mn3O8
Ca2Mn3O8 crystallizes in a monoclinic layered structure with infinite sheets of [Mn3O8]-4 held together by Ca2+ atoms alternately stacked along a axis. Moreover, Mn4+ atoms octahedrally coordinated by oxygen atoms (MnO6) share only edges and result in a honeycomb geometry for Mn4+ cations. The magnetic and heat specific characterization show several anomalies could indicate long-range AF order and/or structural distortion into MnO6 octahedra. Our aim is to characterize the honeycomb Ca2Mn3O8 material by temperature dependent neutron powder diffraction in order to establish the temperature long range order as well as to resolve the magnetic structure in the honeycomb geometry. Moreover, a distortion of MnO6 octahedral is not discarded below Néel temperature and it could be detectable by means neutron diffraction. Therefore, according to ILL instruments availability, we need 1 day in D2B and 1 day in D1B or only 1 day in D20
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HERNANDO GONZALEZ Maria; FERNANDEZ DIAZ Maria Teresa; GONZALEZ Daniel Gabriel; GONZALEZ CALBET Jose Maria; MARTINEZ PENA Jose Luis; MAZARIO FERNANDEZ Angel; PARRAS Marina and VARELA Aurea. (2014). Structural and magnetic characterization in a honeycomb Ca2Mn3O8. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2311
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