Frustration model and spin excitations in the helimagnet FeP
A. S. Sukhanov, Y. V. Tymoshenko, Anton A. Kulbakov, A. S. Cameron, Vilmos Kocsis, H. C. Walker, A. Ivanov, J. T. Park, Vladimir Pomjakushin, С. Е. Никитин, И. В. Морозов, I. O. Chernyavskii, Saicharan Aswartham, A. U. B. Wolter, A. N. Yaresko, B. Büchner, D. S. Inosov
Abstract
Magnetic frustration in a material may drive spin-spiral order, spontaneously breaking the translation and chiral symmetries of the crystal. The underlying hierarchy of magnetic interactions is reflected in the magnon excitations, which can be probed by inelastic neutron scattering. Here, the authors study the dispersions of magnons in the helimagnet FeP and compare the experimentally observed spectra with simulations. Upon examination of alternative models, the authors are able to correctly describe the spin excitations in FeP and unveil the corresponding frustration mechanism.