Dependence of Kambersky damping on Fermi level and spin orientation

Kambersky damping represents the loss of magnetic energy from the electrons to the lattice through the spin orbit interaction. It is demonstrated that, for bcc Fe-based transition metal alloys, the logarithm of the energy loss is proportional to the density of states at the Fermi level. Both inter and intraband damping are calculated for spins at arbitrary angle to the previously examined [001] direction. Although the easy axis ⟨100⟩ shows isotropic relaxation and achieves the minimum damping value of 0.002, other directions, such as ⟨110⟩, show substantial anisotropic damping.