Temperature shift of the maximum of neutron critical scattering as a result of scattering of neutrons on spin waves in a paramagnetic phase

A new physical mechanism which causes the temperature shift of the maximum of neutron critical scattering has been proposed. It has been assumed that a dominant role is played by the scattering of neutrons on spin-wave-like excitations of magnetization fluctuations in the paramagnetic phase. The relationships between the temperature shift and a scattering vector (or observation angle) have been obtained. The theoretical results obtained are in agreement with the experimental data.