Frustrated Ising chains on the triangular lattice in Sr${}_3$NiIrO${}_6$

Abstract

Inelastic neutron scattering study on the spin-chain compound Sr${}_3$NiIrO${}_6$ reveals gapped quasi-1D magnetic excitations. The observed one-magnon band between 29.5 and 39 meV consists of magnon modes of the Ni${}^{2+}$ ions. The fitting of the spin wave spectrum reveals strongly coupled Ising-like chains along the $c$-axis that are weakly coupled into a frustrated triangular lattice in the $ab$-plane. The magnetic excitations survive up to 200 K well above the magnetic ordering temperature of $T_N\sim 75$ K, also indicating a quasi-1D nature of the magnetic interactions in Sr${}_3$NiIrO${}_6$. Our microscopic model is in good agreement with ab initio electronic structure calculations and explains the giant spin flip field observed in bulk magnetization measurements.

arXiv comment10 pages, 7 figures

References in corpus (15)

• Linear spin wave theory for single-Q incommensurate magnetic structures
• Nature of magnetism in Ca${}_3$Co${}_2$O${}_6$
• The nature of the magnetic order in Ca3Co2O6
• Magnetic behavior of Co ions in the exotic spin-chain compound,Ca3Co2O6, from 59Co NMR studies
• Superparamagnetic-like ac susceptibility behavior in a "partially disordered antiferromagnetic" compound, Ca${}_3$CoRhO${}_6$
• Impact of spin-orbit coupling on the magnetism of Sr3MIrO6 (M = Ni, Co)
• Ferromagnetic Exchange Anisotropy from Antiferromagnetic Superexchange in the Mixed 3d-5d Transition-Metal Compound Sr3CuIrO6
• Origin of the long-wavelength magnetic modulation in Ca3Co2O6
• Magnetic order in the frustrated Ising-like chain compound Sr${}_3$NiIrO${}_6$
• Heat-capacity anomalies in the presence of high magnetic fields in the spin-chain compound, Ca3Co2O6
• Ordering of geometrically frustrated classical and quantum Ising magnets
• Anisotropic magnetodielectric coupling behavior of Ca3Co1.4Rh0.6O6 due to geometrically frustrated magnetism
• Magnetization plateau and incommensurate spin modulation in Ca3Co2O6
• One-Dimensional Dispersive Magnon Excitation in the Frustrated Spin-2 Chain System Ca3Co2O6
• Spin orientations of the spin-half Ir4+ ions in Sr3NiIrO6, Sr2IrO4 and Na2IrO3: Density functional, perturbation theory and Madelung potential analyses

Cited by in corpus (9)

• Diffusive Excitonic Bands from Frustrated Triangular Sublattice in a Singlet-Ground-State System
• Nature of the Magnetic Interactions in Sr${}_3$NiIrO${}_6$
• Non-collinear Order and Spin-Orbit Coupling in Sr${}_3$ZnIrO${}_6$
• Spin-lattice and electron-phonon coupling in 3$d$/5$d$ hybrid Sr${}_3$NiIrO${}_6$
• Neutron Scattering Investigation of Rhenium Orbital Ordering in $3d-5d$ Double Perovskite Ca${}_2$FeReO${}_6$
• $J_{eff}$ states in a quasi one dimensional antiferromagnetic spin chain hexagonal Iridates Sr${}_3$MIrO${}_6$ (M=Mg, Zn, Cd): an $ab-initio$ comparative perspective
• Role of crystal field ground state in the classical spin-liquid behavior of a quasi-one dimensional spin-chain system Sr3NiPtO6
• Single-domain ferromagnet of noncentrosymmetric uniaxial magnetic ions and magnetoelectric interaction
• Magnetic ground state and excitations in mixed 3$d$-4$d$ quasi-1D spin-chain oxide Sr${}_3$NiRhO${}_6$