Natural vibrational spectrum and Green’s functions of magnets with complete spontaneous symmetry breaking

The hydro- and thermodynamics of magnets with completely broken symmetry are constructed by using the Fermi-liquid approach. The spectra of free oscillations are obtained and analyzed in the presence and in the absence of an external magnetic field. Low-frequency asymptotic forms of Green’s function in a uniform external magnetic field are calculated. The singularities of basis Green’s functions are considered.

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