Intensity of Magnon Sidebands

Abstract

A general formula is derived for the integrated intensity of magnon sidebands in a two-sublattice antiferromagnet. The integrated intensity variation with temperature is calculated under the (random phase) decoupling approximation. Predicted values of the integrated intensity coincide with that obtained in the spin wave theory at low temperatures and that in the pair spectra theory at high temperature limit. The theory is applied to the rutile type antiferromagnets and numerical calculations are presented for magnon sidebands in MnF₂.