Effect of domain wall width on spin wave dynamics in a non-degenerate Bose gas

Collisions between indistinguishable atoms in ultracold systems above quantum degeneracy can collectively give rise to spin waves via the identical spin rotation effect. We present experimental results to characterize the effect of domain wall width on lifetime and oscillation frequency of spins waves in a two-domain magnetically trapped ultracold gas of Rb-87. Further, we investigate how application of a spin-dependent optical potential can stabilize domain walls of a certain width and produce long-lived spin domains.