Spin-wave damping of domain walls in YFeO3

Abstract

The mobility of domain walls in YFeO3 is determined by calculating the damping of the uniform precession or k=0 spin-wave mode. The presence of antisymmetric exchange is explicitly taken into account in obtaining the spin-wave modes. The dominant spin-wave damping mechanism is found to be a four-magnon scattering process. This process leads to a calculated wall mobility that has the same order of magnitude and temperature dependence as that observed.