High pressure synthesis of polar and non-polar cation-ordered polymorphs of Mn2ScSbO6

E. Solana-Madruga*, A. J. Dos Santos-García, A. M. Arévalo-López, D. Ávila-Brande, C. Ritter, J. P. Attfield, R. Sáez-Puche

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Two new cation-ordered polymorphs of Mn2ScSbO6 have been synthesised at high-pressure. At 5.5 GPa and 1523 K Mn2ScSbO6 crystallizes in the Ni3TeO6-type structure with the polar R3 space group and cell parameters a = 5.3419 (5) Å and c = 14.0603 (2) Å. Below TC = 42.0 K it exhibits ferrimagnetic order with a net magnetization of 0.6μB arising from unusual site-selective Mn/Sc disorder and is thus a potential multiferroic material. A double perovskite phase obtained at 12 GPa and 1473 K crystallizes in the non-polar P21/n monoclinic space group with cell parameters a = 5.2909 (3) Å, b = 5.4698 (3) Å, c = 7.7349 (5) Å and β = 90.165 (6) °. Magnetization and neutron diffraction experiments reveal antiferromagnetic order below TN = 22.3 K with the spins lying in the ac plane.
Original languageEnglish
Pages (from-to)20441-20448
Number of pages8
JournalDalton Transactions
Volume44
Issue number47
Early online date13 Oct 2015
DOIs
Publication statusPublished - 1 Dec 2015

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