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arXiv · 1604.06441

Model for multi-shot all-thermal all-optical switching in ferromagnets

Jon Gorchon·Yang Yang·Jeffrey Bokor
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Abstract

All optical magnetic switching (AOS) is a recently observed rich and puzzling phenomenon that offers promis- ing technological applications. However, fundamental understanding of the underlying mechanisms remains elusive. Here we present a new model for multi-shot helicity-dependent AOS in ferromagnetic materials based on a purely heat-driven mechanism in the presence of Magnetic Circular Dichroism (MCD). We predict that AOS should be possible with as little as 0.5% of MCD, after a minimum number of laser shots. Finally, we re- produce previous AOS results by simulating the sweeping of a laser beam on an FePtC granular ferromagnetic film.

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Jon Gorchon, Yang Yang, Jeffrey Bokor. 2016-04-21. Model for multi-shot all-thermal all-optical switching in ferromagnets. https://doi.org/10.1103/physrevb.94.020409

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