Spin Dynamics in a Stripe-ordered Buckled Honeycomb Lattice Antiferromagnet Ba${}_2$NiTeO${}_6$

Abstract

We carried out inelastic neutron scattering experiments on a buckled honeycomb lattice antiferromagnet Ba${}_2$NiTeO${}_6$ exhibiting a stripe structure at a low temperature. Magnetic excitations are observed in the energy range of $\hslash \omega \lesssim 10$ meV having an anisotropy gap of 2 meV at 2 K. We perform spin-wave calculations to identify the spin model. The obtained microscopic parameters are consistent with the location of the stripe structure in the classical phase diagram. Furthermore, the Weiss temperature independently estimated from a bulk magnetic susceptibility is consistent with the microscopic parameters. The results reveal that a competition between the NN and NNN interactions that together with a relatively large single ion magnetic anisotropy stabilize the stripe magnetic structure.

6 pages, 5 figures

References in corpus (5)

• Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
• Magnetic order in $\alpha$-RuCl${}_3$: a honeycomb lattice quantum magnet with strong spin-orbit coupling
• Magnetic properties of the honeycomb oxide Na${}_2$Co${}_2$TeO${}_6$
• Disordered Ground State and Magnetic Field-Induced Long-Range Order in an S=3/2 Antiferromagnetic Honeycomb Lattice Compound Bi3Mn4O12(NO3)
• Plaquette valence-bond ordering in J_1-J_2 Heisenberg antiferromagnet on the honeycomb lattice

Cited by in corpus (1)

• Magnetic ordering and spin dynamics in $S=5/2$ staggered triangular lattice antiferromagnet Ba${}_2$MnTeO${}_6$