Answers are grounded in this paper and cite their sources.
We have created a nonequilibrium population of antiferromagnetic spin waves in Cr₂O₃, and characterized its dynamics, using frequency- and time-resolved nonlinear optical spectroscopy of the exciton-magnon transition. We observe a time-dependent pump-probe line shape, which results from excitation induced renormalization of the spin-wave band structure. We present a model that reproduces the basic characteristics of the data, in which we postulate the optical nonlinearity to be dominated by interactions with long-wavelength spin waves, and the dynamics to be due to spin-wave thermalization.
No takes yet. Share an insight, caveat, or question.
Dodge et al. (1999) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: