Frustrated Magnetic Interactions in an S = 3/2 Bilayer Honeycomb Lattice Compound Bi3Mn4O12(NO3)

Published

October 22, 2019

Author(s)

M. Matsuda, S. E. Dissanayake, D. L. Abernathy, Yiming Qiu, John R. Copley, N. Kumada, M. Azuma

Abstract

Inelastic neutron scattering study has been performed in an S=3/2 bilayer honeycomb lattice compound Bi₃Mn₄O₁₂(NO₃) at ambient and high magnetic fields. Relatively broad and monotonically dispersive magnetic excitations were observed at ambient field, where no long range magnetic order exists. In the magnetic field-induced long-range ordered state at 10 T, the magnetic dispersions become slightly more intense, albeit still broad as in the disordered state, and two excitations gaps, probably originating from an easy-plane magnetic anisotropy and intrabilayer interactions, develop. Analyzing the magnetic dispersions using the linear spin-wave theory, we estimated the intraplane and intrabilayer magnetic interactions, which are consistent with those determined by ab initio density functional theory calculations [M. Alaei et al., Phys. Rev. B 96, 140404 (R) (2017)], except the 3rd and 4th neighbor intrabilayer interactions. Most importantly, as predicted by the theory, there is no frustration in the honeycomb plane but frustrating intrabilayer interactions probably give rise to the disordered ground state.

Citation

Physical Review B

Volume

100

Issue

13

Pub Type

Journals

Download Paper

Local Download

Keywords

spin wave, inelastic neutron scattering

Citation

Matsuda, M. , Dissanayake, S. , Abernathy, D. , Qiu, Y. , Copley, J. , Kumada, N. and Azuma, M. (2019), Frustrated Magnetic Interactions in an S = 3/2 Bilayer Honeycomb Lattice Compound Bi₃Mn₄O₁₂(NO₃), Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=928243 (Accessed December 12, 2024)