The spin waves in MnO have been studied at various temperatures from 4.2 K to the Néel temperature TN of 117 K by means of neutron inelastic scattering techniques. The dispersion curves in the ,  and  direction have been determined. Using the spin Hamiltonian with distance dependent n.n. interaction, n.n.n. interaction and dipole-dipole interaction, the spin wave theory involving magnon-magnon interaction has been developed. It has been found that the theory interprets not only the spin wave dispersion curves at 4.2 K but also its temperature dependence up to T/Tn=0.9. The magnon density of states has been calculated.
|Number of pages||11|
|Journal||Journal of the Physical Society of Japan|
|Publication status||Published - Jan 1974|
ASJC Scopus subject areas
- Physics and Astronomy(all)