Magnetic excitations in frustrated fcc type-III antiferromagnet MnS${}_2$

Abstract

Spin wave dispersion in the frustrated fcc type-III antiferromagnet MnS${}_2$ has been determined by inelastic neutron scattering using a triple-axis spectrometer. Existence of multiple spin wave branches, with significant separation between high-energy and low-energy modes highlighting the intrinsic magnetic frustration effect on the fcc lattice, is explained in terms of a spin wave analysis carried out for the antiferromagnetic Heisenberg model for this $S=5/2$ system with nearest and next-nearest-neighbor exchange interactions. Comparison of the calculated dispersion with spin wave measurement also reveals small suppression of magnetic frustration resulting from reduced exchange interaction between frustrated spins, possibly arising from anisotropic deformation of the cubic structure.

References in corpus (1)

• Monte Carlo study of first-order transition in Heisenberg fcc antiferromagnet

Cited by in corpus (5)

• Quantum versus thermal fluctuations in the fcc antiferromagnet: alternative routes to order by disorder
• Magnon spectrum of the Weyl semimetal half-Heusler compound GdPtBi
• Ground state selection by magnon interactions in the fcc antiferromagnet
• Disordered ground state in the three-dimensional face-centred frustrated spin-$\frac{5}{2}$ system MnSn(OH)${}_{\text{6}}$
• Microscopic Origin of Reduced Magnetic Order in a Frustrated Metal