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Ultrafast antiferromagnetic switching of Mn₂Au with laser-induced optical torques

Physics

Ultrafast antiferromagnetic switching of Mn₂Au with laser-induced optical torques

J. L. Ross, P. Gavriloaea, et al.

This cutting-edge research by Jackson L. Ross and colleagues unveils a novel technique for antiferromagnetic domain switching utilizing laser optical torques. Their simulations reveal remarkable precessional toggle switching of the Néel vector in Mn₂Au, showcasing a new frontier in the all-optical control of antiferromagnets.

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Playback language: English
Abstract
This paper predicts a novel method for antiferromagnetic domain switching using laser optical torques (LOTs). Atomistic spin dynamics simulations demonstrate picosecond 90 and 180-degree precessional toggle switching of the Néel vector in Mn₂Au with laser fluences on the order of mJ/cm². The LOTs' symmetry minimizes overshooting, and deterministic, non-toggle switching is also demonstrated. Even with ultrafast laser heating, a large parameter range allows for high switching probabilities. This method could be used independently or in conjunction with other techniques for all-optical control of antiferromagnets.
Publisher
npj Computational Materials
Published On
Oct 03, 2024
Authors
Jackson L. Ross, Paul-Iulian Gavriloaea, Frank Freimuth, Theodoros Adamantopoulos, Yuriy Mokrousov, Richard F. L. Evans, Roy Chantrell, Rubén M. Otxoa, Oksana Chubykalo-Fesenko
Tags
antiferromagnetic domain switching
laser optical torques
Néel vector
picosecond switching
Mn₂Au
spin dynamics
ultrafast laser heating

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