Laser-enhanced magnetism in SmFeO3

Yarmohammadi, Mohsen; Bukov, Marin; Oganesyan, Vadim; Kolodrubetz, Michael H.

doi:10.1103/PhysRevB.109.224417

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Laser-enhanced magnetism in SmFeO₃

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Bukov, Marin
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Citation

Yarmohammadi, M., Bukov, M., Oganesyan, V., & Kolodrubetz, M. H. (2024). Laser-enhanced magnetism in SmFeO₃. Physical Review B, 109(22): 224417. doi:10.1103/PhysRevB.109.224417.

Cite as: https://hdl.handle.net/21.11116/0000-000F-A9B6-5

Abstract

We investigate the coherent enhancement of inherently weak magnetic interactions in rare-earth orthoferrite SmFeO3 as a functional material for spintronic applications using a realistic model of dissipative spin dynamics that are linearly and quadratically coupled to laser-driven infrared-active phonons. When linear coupling dominates, we discover a magnetophononic dynamical first-order phase transition in the nonequilibrium steady state which can inhibit strong enhancement of magnetic interactions. By contrast, when quadratic spin-phonon coupling dominates, no phase transition exists at experimentally relevant parameters. By utilizing a chirp protocol, the phase transition can be engineered, enabling stronger magnetic interactions. We also discuss the route for experimental observation of our results.