Photon Pumped Spin Wave Instability in Rutile-Type Antiferromagnets. II. Raman Scattering

Abstract

It is shown that Raman-scattering mechanism associated with one photon-two magnon process in rutile-type antiferromagnets causes spin wave instability, if the intensity of the incident radiation exceeds a certain threshold value. Nonthermal excitation of magnons is possible by the use of this spin wave instability. An order estimation of the threshold value is given.