Condensed Matter Physics, 1998, Vol. 1, No 1 (13), p. 145-160

Long-wave spin excitations of crystalline s — d models

Yu.Rudavsky, G.Ponedilok, L.Dorosh

State University "Lvivska Politechnika" 12 S.Bandera St., UA-290646 Lviv-13, Ukraine

Received June 6,1998

Long-wave spin excitations in the perfect s-d model are studied. The Hamiltonian of the model includes, apart from usually treated spin-electron processes, the Heisenberg exchange interaction of atomic spins and the Coulomb interaction of conductive electrons. Hartree-Fock and Tyablikov approximations are used for closing the hierarchy of equations of motion for the double-time Green functions. The equation for the magnon excitations spectrum in this approximation is obtained.

Key words: magnon, magnetization, dispersion law
PACS: 75.30.Ds, 75.50.K

© Yu.Rudavsky, G.Ponedilok, L.Dorosh