INTRINSIC DAMPING
This chapter considers damping due to transfer of magnetic motion to degrees of freedom that cannot be described by the magnetization vector alone. Four different mechanisms are considered: magnetostrictive coupling to a lossy lattice, magnetic losses in a metal, coupling to fluctuating valence sites, and inelastic coupling to localized magnetic impurities. The aim here is not to discover new physics. Rather, the idea is to eliminate the parasitic degrees of freedom in favour of the magnetization field, ending up with an equation of motion for the magnetization field alone, which usually is the only object of interest.
Keywords: magnetization vector, magnetostrictive coupling, loss torque, relaxation
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