Abstract

To determine the neutron inelastic coherent scattering (NIS) cross-section for disordered magnets a system of equations of motion for the Green functions (GF) related to the localized-spin correlation-functions S R +S R′ − , S R −S R′ − , S R zS R′ − has been exploited. The formula for the magnon dispersion relations derived here covers a number of spin structures and depends on the configuration averages of the local fields. It should be emphasized that in particular it works for transverse antiferromagnets.

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