Magnetic switching dynamics in a ferrimagnetic two sub-lattice model including ultrafast exchange scattering

Abstract

We study the heat-induced magnetization dynamics in a toy model of a ferrimagnetic alloy, which includes localized spins antiferromagnetically coupled to an itinerant carrier system with a Stoner gap. We determine the one-particle spin-density matrix including exchange scattering between localized and itinerant bands as well as scattering with phonons. While a transient ferromagnetic-like state can always be achieved by a sufficiently strong excitation, this transient ferromagnetic-like state only leads to magnetization switching for model parameters that also yield a compensation point in the equilibrium M(T) curve.

References in corpus (3)

• Theory of ferromagnetic (III,Mn)V semiconductors
• Ultrafast demagnetization in the sp-d model: a theoretical study
• Magnetization dynamics and damping due to electron-phonon scattering in a ferrimagnetic exchange model

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• Switching ferromagnetic spins by an ultrafast laser pulse: Emergence of giant optical spin-orbit torque
• First-principles and model simulation of all-optical spin reversal
• Influence of non-magnetic impurity scattering on the spin dynamics in diluted magnetic semiconductors
• Element-resolved ultrafast demagnetization rates in ferrimagnetic CoDy
• Is perpendicular magnetic anisotropy essential to all-optical ultrafast spin reversal in ferromagnets?
• Demagnetizing fields in all-optical switching