Exchange relaxation as the mechanism of ultrafast spin reorientation in two-sublattice ferrimagnets

Abstract

In the exchange approximation, an exact solution is obtained for the sublattice magnetizations evolution in a two-sublattice ferrimagnet. Nonlinear regimes of spin dynamics are found that include both the longitudinal and precessional evolution of the sublattice magnetizations, with the account taken of the exchange relaxation. In particular, those regimes describe the spin switching observed in the GdFeCo alloy under the influence of a femtosecond laser pulse.

5 pages, 1 figure

References in corpus (2)

• Super-Diffusive Spin-Transport as a Mechanism of Ultrafast Demagnetization
• Role of critical spin fluctuations in ultrafast demagnetization of transition-metal rare-earth alloys

Cited by in corpus (13)

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• Magnetic and all-optical switching properties of amorphous Tb${}_x$Co${}_{100-x}$ alloys
• Modeling ultrafast all-optical switching in synthetic ferrimagnets
• Ab initio investigation of light-induced relativistic spin-flip effects in magneto-optics
• Universal criteria for single femtosecond pulse ultrafast magnetization switching in ferrimagnets
• Helicity-independent all-optical switching of magnetization in ferrimagnetic alloys
• Unified theory of magnetization dynamics with relativistic and nonrelativistic spin torques
• Signatures of relativistic spin-light coupling in ultrafast magneto-optical pump-probe experiments
• Ultrafast cooling and heating scenarios for the laser induced phase transition in CuO
• Realistic micromagnetic description of all-optical ultrafast switching processes in ferrimagnetic alloys