Theory of paramagnetic spin waves in simple metals in a direct-current magnetic field

The transverse dynamic spin susceptibility of a normal, charged Fermi liquid is found. The formula depends on the first three antisymmetric Landau parametersB₀,B₁,B₂ and is exact to orderk² in the expressions both for the energy of spin waves and their oscillator strengths. It contains spin-wave poles with1=0 and 1 and easily reproduces all the results obtained previously by perturbation theory.On leave of absence from: Institute of Physics, University of Lattakia, Syria.