Three-Dimensional Magnetism and the Dzyaloshinskii-Moriya Interaction in S=3/2 Kagome Staircase Co3V2O8

Published

May 1, 2020

Author(s)

Joel Helton, Nicholas P. Butch, Daniel M. Pajerowski, Sergei N. Barilo, Jeffrey W. Lynn

Abstract

Time-of-flight neutron spectroscopy reveals spin waves in the ferromagnetic ground state of the kagome staircase material Co₃₂V₂O₈. While previous work has treated this material as quasi-two-dimensional we find an inherently three-dimensional spin Hamiltonian. A model of ferromagnetic first, third, and fourth-nearest neighbor interactions and an antiferromagnetic twelfth-nearest neighbor interactions and an antiferromagnetic twelfth-nearest neighbor interaction describes the spin wave spectrum throughout reciprocal space. The spin wave branches show gaps that point to a signification Dzyaloshinskii-Moriya interaction on the nearest-neighbor bond, with D₁≥J_{1/2. A better understanding of the Dzyaloshinskii-Moriya interaction in this material could shed light on the multiferroicity of the structurally similar Ni}d3^V₂O₈. At a higher temperature where Co₃V₂O₈ displays an antiferromagnetic spin density wave structure there are no well-defined spin wave excitations, with most of the spectral weight observed in broad diffuse scattering centered at the (0, 0.5, 0) antiferromagnetic Bragg peak.

Citation

Science Advances

Volume

6

Issue

18

Pub Type

Journals

Download Paper

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Keywords

Frustrated magnetism, kagome staircase, spin waves, Multiferroics

Citation

, J. , Butch, N. , , D. , , S. and Lynn, J. (2020), Three-Dimensional Magnetism and the Dzyaloshinskii-Moriya Interaction in S=3/2 Kagome Staircase Co₃V₂O₈, Science Advances, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=928576 (Accessed October 6, 2024)