Spectrum and damping of magnetostatic waves in the ferromagnetic semiconductor HgCr2Se4 with magnon heating by an electric field

An investigation is made of the influence of the electrical conductivity and an electric field on the spectrum and damping of magnetostatic wave in the ferromagnetic semiconductor HgCr 2 Se 4 . The experimental dependences of the width of a magnetostatic wave line on the wave number of the electrical conductivity are in agreement with theoretical calculations. A reduction in the electrical conductivity (by a factor of ∼ 10) and of the damping of magnetostatic waves in relatively weak (∼ 1 kV/cm) electric fields, as well as galvanomagnetic properties of HgCr 2 Se 4 , are discussed within a model of magnon heating by hot carriers