Stimulated acoustic Raman scattering in an antiferromagnet
Lebedev A. Yu., Ozhogin V. I., Yakubovskii A. Yu.
Parametric excitation of sound by sound has been observed in a magnetic material for the first time. The threshold strain amplitude in the pump wave can be achieved in practice in hematite single crystals, because it is easy to arrange a large effective anharmonicity of the elastic subsystem in antiferromagnets.