Modeling ultrafast all-optical switching in synthetic ferrimagnets

Abstract

Based on numerical simulations, we demonstrate thermally induced magnetic switching in synthetic ferrimagnets composed of multilayers of rare-earth and transition metals. Our findings show that deterministic magnetization reversal occurs above a certain threshold temperature if the ratio of transition metal atoms to rare-earth atoms is sufficiently large. Surprisingly, the total thickness of the multilayer system has little effect on the occurence of switching. We further provide a simple argument to explain the temperature dependence of the reversal process.

arXiv comment6 pages, 5 figures

References in corpus (2)

• Exchange relaxation as the mechanism of ultrafast spin reorientation in two-sublattice ferrimagnets
• Magnetism of gadolinium: a first-principles perspective

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