Magnetic Excitations in Locally Non-Equilibrium Media
|Periodical||Solid State Phenomena (Volume 190)|
|Main Theme||Magnetism and Magnetic Materials V|
|Edited by||N. Perov and V. Rodionova|
|Citation||A. Kabychenkov, 2012, Solid State Phenomena, 190, 19|
|Online since||June, 2012|
|Keywords||Motion Equation for Magnetization, Spin-Electromagnetic Wave|
The motion equation for magnetization in locally non-equilibrium media is derived. It is shown that in non-ordered media locally non-equilibrium excitations have peculiarities. There exist coupled waves of the magnetization and magnetic vector potential. Dispersion relation of the waves have frequencies corresponding to undamped waves or constant-phase damped waves and frequencies corresponding to change of real and imaginary parts of the wave number relation. Spectrum of the non-equilibrium fluctuations exhibits some pair of spin-electromagnetic modes without energy gap and electromagnetic-spin modes with energy gap branches.