To coherently enhance inherent weak magnetic interactions in rare-earth orthoferrite SmFeO3 as a functional material for spintronic applications, we simulate the 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.
@article{arxiv.2308.14939,
title = {Laser-enhanced magnetism in SmFeO$_3$},
author = {Mohsen Yarmohammadi and Marin Bukov and Vadim Oganesyan and Michael H. Kolodrubetz},
journal= {arXiv preprint arXiv:2308.14939},
year = {2024}
}