Title:LONG-WAVE SPIN EXCITATIONS OF CRYSTALLINE s-d MODELS
Authors:Yu.Rudavsky, G.Ponedilok, L.Dorosh (State University "Lvivska Politechnika", 12 S.Bandera St., UA-290646 Lviv-13, Ukraine)
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
Comments: Figs. 0, Refs. 21, Tabs. 0.
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