Abstract
The temperature dependent part of magnon damping in disordered ferromagnetic metals is investigated within the framework of the spin operator diagram technique. The interference between the magnon electron interaction and the Coulomb one as well as the electron-impurity rescattering are considered. The calculations shows, that the contribution to the magnon relaxation rate due to this interference mechanism is of the hydrodynamic type γ k ∼ k zω k which depends on temperature as √ T for d=3, log( T) for d=2 and 1/√ T for d=1 ( d is the space dimensionality).
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