Abstract
The effects of electron-lattice collisions on the nonuniform transverse susceptibility of an itinerant ferromagnet are found from the quantum-statistical equations of motion in the molecularfield approximation. The effects of pure orbital collisions and the corresponding “diffusion” correction are found to be negligible, in agreement with the conclusions of P. Fulde and A. Luther. The effect of magnetic (spin-orbital) collisions is included in the Gilbert damping and does not contribute to the “diffusion” correction. The form of the susceptibility and of the corresponding macroscopic equation of motion, and also the contradictions between this and a number of previous studies are discussed in detail.
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