Frustrated Magnetism of the Maple-Leaf-Lattice Antiferromagnet MgMn${}_3$O${}_7$$\cdot$3H${}_2$O

Abstract

We present a novel hydrated layered manganate MgMn${}_3$O${}_7$$\cdot$3H${}_2$O as a maple-leaf-lattice (MLL) antiferromagnet candidate. The MLL is obtained by regularly depleting 1/7 of the lattice points from a triangular lattice so that the magnetic connectivity $z=5$ and is thus intermediately frustrated between the triangular ($z=6$) and kagomé ($z=4$) lattices. In MgMn${}_3$O${}_7$$\cdot$3H${}_2$O, the Mn${}^{4+}$ ions, carrying Heisenberg spin 3/2, form a regular MLL lattice in the quasi-two-dimensional structure. Magnetization and heat capacity measurements using a hydrothermally-prepared powder sample reveal successive antiferromagnetic transitions at 5 and 15 K. A high-field magnetization curve up to 60 T at 1.3 K exhibits a multi-step plateau-like anomaly. We discuss the unique frustration of the MLL antiferromagnet in which the chiraldegree of freedom may play an important role.

arXiv comment9 pages, 10 figures, Accepted for publication in Physical Review B

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• Dimensional reduction in quantum spin-1/2 system on a 1/7-depleted triangular lattice
• Two-dimensional short-range spin-spin correlations in the layered spin-3/2 maple leaf lattice antiferromagnet Na2Mn3O7 with crystal stacking disorder
• Candidate quantum spin liquids on the maple-leaf lattice
• Tensor network analysis of the maple-leaf antiferromagnet spangolite
• Chiral crossroads in $\mathrm{H}{\mathrm{o}}_3\mathrm{Sc}{\mathrm{O}}_6$: a tale of frustration in maple leaf lattice
• Symmetry breaking and competing valence bond states in the star lattice Heisenberg antiferromagnet
• Spin Nernst and thermal Hall effects of topological triplons in quantum dimer magnets on the maple-leaf and star lattices
• Unconventional orders in the maple-leaf ferro-antiferromagnetic Heisenberg model
• Thermodynamics of the Heisenberg antiferromagnet on the maple-leaf lattice
• Magnetic excitations and exchange parameters of a nickel chain compound PbMn${}_2$Ni${}_6$Te${}_3$O${}_{18}$: Neutron scattering and density functional theory studies
• Crystallography-driven molecularization of a two-dimensional spin-$3/2$ magnet