Ultrafast optomagnetic bistable effects in magnetically – ordered materials

Abstract

An ultrashort laser pulse (ULP) excites the spin precession in the magnetically-ordered dielectrics, as stated in [1-3]. The spin-reorientation phase transition in orthoferrites can be induced by an ULP and the rise of time of this transition is equal to a few picoseconds [1, 2]. The Landau–Lifshits equation-based description of the reorientation phase transitions dynamics was considered in [4–7].