Absence of magnetic ordering in NiGa_2S_4

Abstract

Triangular-layered NiGa2S4, contrary to intuitive expectation, does not form a noncollinear antiferromagnetic structure, as do isoelectronic NaCrO2 and LiCrO2. Instead, the local magnetic moments remain disordered down to the lowest measured temperature. To get more insight into this phenomenon, we have performed first principles calculations of the first, second end third neighbors exchange interactions, and found that the second neighbor exchange is negligible, while the first and the third neighbor exchanges are comparable and antiferromagnetic. Both are rapidly suppressed by the on-site Hubbard repulsion.

4 pages, 4 figures

References in corpus (5)

• The quadrupolar phases of the S=1 bilinear-biquadratic Heisenberg model on the triangular lattice
• Spin Nematic Phase in S=1 Triangular Antiferromagnets
• Possible ferro-spin nematic order in NiGa2S4
• Unusual superexchange pathways in a Ni triangular lattice of NiGa${}_2$S${}_4$ with negative charge-transfer energy
• Electronic structure and magnetism in the frustrated antiferromagnet LiCrO2

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• Halperin-Saslow modes as the origin of the low temperature anomaly in $NiG{a}_2{S}_4$
• High Field ESR and Magnetization of the Triangular Lattice Antiferromagnet NiGa2S4
• Method for Estimating Spin-Spin Interactions from Magnetization Curves
• First-Order Phase Transition with Breaking of Lattice Rotation Symmetry in Continuous-Spin Model on Triangular Lattice
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• Magnetic correlations in triangular antiferromagnet FeGa${}_2$S${}_4$
• Phase diagram of a bilinear-biquadratic spin-1 model on the triangular lattice from density matrix renormalization group simulations
• Data-driven determination of the spin Hamiltonian parameters and their uncertainties: The case of the zigzag-chain compound KCu${}_4$P${}_3$O${}_{12}$
• The spin-1 two-dimensional J1-J2 Heisenberg antiferromagnet on a triangular lattice
• Incommensurate Phase of a Triangular Frustrated Heisenberg Model Studied via Schwinger-Boson Mean-Field Theory
• Magnetic properties of the spin-1 two-dimensional $J_1-J_3$ Heisenberg model on a triangular lattice
• Weak-coupling Mean-field Theory of Magnetic Properties of NiGa${}_2$S${}_4$