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Journal articles
Magnetodielectric Effect in Crystals of the Noncentrosymmetric CaOFeS at Low Temperature
Abstract : Single crystals of the stoichiometric iron calcium oxysulfide CaOFeS have been grown by a solid-state reaction. Structural analysis of CaOFeS at room temperature by combining single-crystal X-ray diffraction data and transmission electron microscopy leads to a stoichiometric hexagonal noncentrosymmetric P63mc layered structure isostructural to CaOZnS. It is built from alternating layers made of FeOS3 tetrahedra sharing sulfur apexes and stacked with Ca2+ planes. All Fe-O bonds are parallel to the stacking axis; this breaks the centrosymmetry, leading to a polar structure. The dielectric measurements reveal the existence of a magnetodielectric effect near 33 K in good agreement with the Neel temperature, as evidenced near 35 K by specific heat measurements reported by a different group. (Figure Presented). © 2015 American Chemical Society.
https://hal-normandie-univ.archives-ouvertes.fr/hal-02184139
Contributor : Elisabeth van T Hof <>
Submitted on : Monday, July 15, 2019 - 6:05:22 PM
Last modification on : Wednesday, April 15, 2020 - 11:00:11 AM
Contributor : Elisabeth van T Hof <>
Submitted on : Monday, July 15, 2019 - 6:05:22 PM
Last modification on : Wednesday, April 15, 2020 - 11:00:11 AM
