Two‐Dimensional Antiferromagnetism in the [Mn3+xO7][Bi4O4.5−y] Compound with a Maple‐Leaf Lattice

Aliev, Almaz; Huvé, Marielle; Colis, S.; Colmont, Marie; Dinia, A.; Mentré, Olivier

doi:10.1002/ange.201203775

Cited by 7 publications

(4 citation statements)

References 22 publications

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“…We can also cite the phosphate based Ca 9 Fe(PO 4 ) 7 phase, with oxygen atoms all involved in phosphate groups 18 similarly to the title compound. While in oxides, a weak d 6 JT distortion could be easily suppressed by…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…For both compounds, the changes between the initial and final crystal structures involve re-entrant symmetries rather than re-entrant structural transitions. Our search for new isolated 2D layered-magnetic systems (e.g., maple-leaf lattice of Mn 2+ , Mn 3+ , and Mn 4+ ions) has recently led to BaFe 2 (PO 4 ) 2 consisting of honeycomb layers made up of edge-sharing FeO 6 octahedra containing high-spin Fe 2+ (d 6 ) ions. On cooling this oxide exhibits a striking re-entrant transition from the paramagnetic room-temperature (RT) form (space group R -3) to an intermediate paramagnetic phase (space group P -1) at 140 K and back to a R -3 ferromagnetic (FM) phase at 75K (near the ferromagnetic transition temperature T c = 65.5K) .…”

Section: Introductionmentioning

confidence: 99%

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Across the Structural Re-Entrant Transition in BaFe₂(PO₄)₂: Influence of the Two-Dimensional Ferromagnetism

et al. 2013

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BaFe2(PO4)2 was recently prepared by hydrothermal synthesis and identified as the first two-dimensional (2D) Ising ferromagnetic oxide, in which honeycomb layers made up of edge-sharing FeO6 octahedra containing high-spin Fe(2+) ions (S = 2) are isolated by PO4 groups and Ba(2+) cations. BaFe2(PO4)2 has a trigonal R-3 structure at room temperature but adopts a triclinic P-1 structure below 140 K due to the Jahn-Teller (JT) instability arising from the (t2g)(4)(eg)(2) configuration. The triclinic crystal structure was refined to find significantly distorted Fe(2+)O6 octahedra in the honeycomb layers while the distortion amplitude QJT was estimated to 0.019 Å. The JT stabilization energy is estimated to be ∼7 meV per formula unit by DFT calculations. Below ∼70 K, very close to the ferromagnetic transition temperature Tc = 65.5 K, the structure of BaFe2(PO4)2 returns to a trigonal R-3 structure in the presence of significant ferromagnetic domains. This rare re-entrant structural transition is accompanied by a discontinuous change in the quadrupolar splitting of Fe(2+), as determined by Mössbauer spectroscopy. EPR measurements show the presence of magnetic domains well above Tc , as expected for a ferromagnetic 2D Ising system, and support that the magnetism of BaFe2(PO4)2 is uniaxial (g⊥ = 0).

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Across the Structural Re-Entrant Transition in BaFe₂(PO₄)₂: Influence of the Two-Dimensional Ferromagnetism

et al. 2013

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“…Doping can improve the performance of oxides. [7] However, previous works are mainly focused on metal cations/MnO 2 systems and the resultant improvement in electronic conductivity and capacitance is obscure.…”

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Enhanced Supercapacitor Performance of MnO₂ by Atomic Doping

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“…It can be obtained by periodically depleting 1/7 of the sites of a triangular lattice, and is located in the diagram in between the triangular and kagome lattices. Experimental realizations of maple-leaf structure are reported both in natural minerals [28][29][30] and in manmade crystals [31][32][33][34] . In theories, the ED study shows that the ground states of Heisenberg antiferromagnet on the maple-leaf lattice with spatially uniform interactions hosts six-sublattice long-range order similar to the one found in the classical contourpart 35,36 .…”

Section: Introductionmentioning

confidence: 99%

Dimensional reduction in quantum spin-1/2 system on a 1/7-depleted triangular lattice

Makuta,

Hotta

2021

Preprint

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We study the magnetism of a quantum spin-1/2 antiferromagnet on a maple-leaf lattice which is obtained by regularly depleting 1/7 of the sites of a triangular lattice. Although the interactions are set to be spatially uniform, the ground state shows a stripe Néel order and the temperature dependence of magnetic susceptibility follows that of the one-dimensional XXZ model with a finite spin gap. We examine the nature of frustration by mapping the low energy degenerate manifold of states to the fully packed loop-string model on a dual cluster-depleted honeycomb lattice, finding that the order-by-disorder due to quantum fluctuation characteristic of highly frustrated magnets is responsible for the emergent stripes. The excited magnons split into two spinons and propagate in the one-dimensional direction along the stripe which is reminiscent of the XXZ or Ising model in one dimension. Unlike most of the previously studied dimensional reduction effects, our case is purely spontaneous as the interactions of the Hamiltonian retains a spatially isotropic two-dimensional structure.

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Two‐Dimensional Antiferromagnetism in the [Mn_3+xO₇][Bi₄O_4.5−y] Compound with a Maple‐Leaf Lattice

Cited by 7 publications

References 22 publications

Across the Structural Re-Entrant Transition in BaFe₂(PO₄)₂: Influence of the Two-Dimensional Ferromagnetism

Across the Structural Re-Entrant Transition in BaFe₂(PO₄)₂: Influence of the Two-Dimensional Ferromagnetism

Enhanced Supercapacitor Performance of MnO₂ by Atomic Doping

Dimensional reduction in quantum spin-1/2 system on a 1/7-depleted triangular lattice

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Two‐Dimensional Antiferromagnetism in the [Mn3+xO7][Bi4O4.5−y] Compound with a Maple‐Leaf Lattice

Cited by 7 publications

References 22 publications

Across the Structural Re-Entrant Transition in BaFe2(PO4)2: Influence of the Two-Dimensional Ferromagnetism

Across the Structural Re-Entrant Transition in BaFe2(PO4)2: Influence of the Two-Dimensional Ferromagnetism

Enhanced Supercapacitor Performance of MnO2 by Atomic Doping

Dimensional reduction in quantum spin-1/2 system on a 1/7-depleted triangular lattice

Contact Info

Product

Resources

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Two‐Dimensional Antiferromagnetism in the [Mn_3+xO₇][Bi₄O_4.5−y] Compound with a Maple‐Leaf Lattice

Across the Structural Re-Entrant Transition in BaFe₂(PO₄)₂: Influence of the Two-Dimensional Ferromagnetism

Across the Structural Re-Entrant Transition in BaFe₂(PO₄)₂: Influence of the Two-Dimensional Ferromagnetism

Enhanced Supercapacitor Performance of MnO₂ by Atomic Doping