SPECTRA OF ELEMENTARY EXCITATIONS AND PHASE DIAGRAM OF NON-HEISENBERG SPIN-2 MAGNETIC
The spectra of elementary excitations have been investigated for spin-2 non-Heisenberg magnetic with the account of all spin invariants. Analysis of the spectra of elementary excitations allowed to construct the phase diagram of the magnet at various relationship between the exchange integrals. In case of single-sublattice magnet, there is equivalence with the phase states and excitation spectra behavior of spin-2 Bose-gas of ultracold atoms.