Fig. (1) Dependencies of refraction indexes of both branches of
spin wave n+ and n- on value of a spin wave frequency ω. α1 =
5.44×10-11 cm2, α2 = 6×10-11 cm2, β1 = 10, β2 = 15, ρ2 = 2, L1 =
25×105 cm-1, L2 = 30×105 cm-1, M01 = 105 G, M02 = 95 G, H0 =
1500 Oe.