Abstract
Inelastic scattering of neutrons by spin waves is investigated in ferromagnetic metals with multiple bands. Differential scattering cross sections due to various branches of spin waves are estimated. It is found that at 0°K the differential scattering cross section due to spin waves in an acoustical intra-band branch shows a maximum as a function of the momentum of spin waves, because of the existence of an acoustical inter-band branch. In the two band model, the dispersion relations of spin waves and the differential scattering cross sections are numerically calculated. A possibility of the observation of the neutron scatterings due to the acoustical inter-band branch is discussed.
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