Crystal and magnetic structure of Howardevansite and its candidate multiferroic Li analogue
Both systems, NaCuFe2(VO4)3 , and its analogue, LiCuFe2(VO4)3 , crystallize in the triclinic space group P-1. It is the lowest possible symmetry allowing for a multiferroic transition and indeed, the dielectric constant of the Li compound exhibits a strong peak, while there is no dielectric anomaly for the Na compound. The entity of information for LiCuFe2(VO4)3 suggests a multiferroic state with a possibly different mechanism of multiferroic coupling. We therefore propose to study the nuclear and magnetic structures of the two materials, NaCuFe2(VO4)3 and LiCuFe2(VO4)3 , by powder neutron diffraction on the D1B and D2B diffractometer.
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BIESENKAMP Sebastian; M. Braden and Thomas C. Hansen. (2020). Crystal and magnetic structure of Howardevansite and its candidate multiferroic Li analogue. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2795
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