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Magnetic structure of polar G-type charge- and orbital-ordered Hg-manganite quadruple perovskites

Ben R. M. Tragheim1,2, Fabio Orlandi3, En-Pei Liu4,5, Wei-Tin Chen5,6,7,*, and Mark S. Senn1,†

  • *Contact author: weitinchen@ntu.edu.tw
  • †Contact author: m.senn@warwick.ac.uk
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Phys. Rev. B 113, 104425 – Published 13 March, 2026

DOI: https://doi.org/10.1103/ksth-6xwr

Abstract

The magnetic structure of Hg0.7Na0.3Mn3Mn4O12, a quadruple manganite perovskite that exhibits a unique G-type charge- and orbital-ordered state distinct to other A2+Mn3Mn4O12 equivalents (A=Ca,Sr,Cd,Pb), has been solved using powder neutron diffraction and symmetry-motivated analysis. A G-type-like antiferromagnetic (AFM) ordering of Mn on the A′ sites and a ‘‘up-up–down-down’’ AFM moment configuration of Mn spins on the B sites is found to occur. The mechanism for the onset and stabilization of B-site up-up–down-down AFM order is explored in terms of coupling between structural and magnetic distortions. The results presented here provide evidence of the exotic charge, orbital, electronic, and magnetic orderings that quadruple manganite perovskites demonstrate, and further highlighting the distinct chemistry that Hg2+ plays in stabilizing novel states compared to other divalent A-site cation equivalents.

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Phys. Rev. B 113, 104425– Published 13 March, 2026
  • Received 17 December 2025
  • Accepted 25 February 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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