Phonon-induced magnetization dynamics in Co-doped iron garnets

The developing field of strain-induced magnetization dynamics offers a promising path toward efficiently controlling spins and phase transitions. Understanding the underlying mechanisms is crucial in finding optimal parameters supporting phononic switching magnetization. Here, we present an experimental numerical study time-resolved driven by resonant excitation optical phonon mode iron garnets. Upon pumping latter with infrared pulse obtained from free-electron laser, observe spatially-varying precession, its depending on direction external magnetic field. Our micromagnetic simulations effectively describe precession terms laser-induced changes crystal's magneto-elastic energy.