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MA: Fachverband Magnetismus
MA 27: Frustrated Magnets I
MA 27.12: Talk
Wednesday, March 20, 2024, 18:00–18:15, H 2013
Magnetism in the 3D face-centred frustrated spin-5/2 system MnSn(OH)6 — •Kaushick K. Parui1, Anton A. Kulbakov1, Roman Gumeniuk2, Maxim Avdeev3,4, Darren C. Peets1, and Dmytro S. Inosov1 — 1IFMP, Technische Universität Dresden, 01069 Dresden, Germany — 2Institut für Experimentelle Physik, TU Bergakademie Freiberg, 09596 Freiberg, Germany — 3ANSTO, Lucas Heights, NSW 2234, Australia — 4School of Chemistry, The University of Sydney, Sydney 2006, Australia
Manganese tin hydroxide, MnSn(OH)6 is an A-site-vacant double perovskite with the general stoichiometry 2(BB′)(OH)6, where B and B′ are transition metals. Here, the magnetic Mn2+ ions sit on a face-centred sublattice, which makes the system frustrated and is expected to exhibit exotic magnetism. The structure is characterized by the presence of alternating corner-linked [Mn2+(OH)6] and [Sn4+(OH)6] octahedra. Our magnetization measurements reveal the Curie-Weiss temperature of −5.13(1) K, indicating antiferromagnetic interactions, and a paramagnetic moment of ≈ 5.6 µ B. Despite that, specific heat measurements do not show any sharp magnetic transitions down to 350 mK. This suppression of the magnetic order hints towards a large frustration factor >10. We also report the results of neutron diffraction measurements down to 20 mK and structure refinements based on x-ray and neutron powder diffraction data.
Keywords: Frustrated Magnetism; Neutron diffraction; Specific heat; Antiferromagnetism; Hydroxide Perovskite