Extending the scope and understanding of all-optical magnetization switching in Gd-based alloys by controlling the underlying temperature transients

2023/09/26 by Maxime Vergès, Wei Zhang, Verges, Maxime +15 · 2 citations
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic properties of thin films #Magneto-Optical Properties and Applications #Materials Science (cond-mat.mtrl-sci) #Phase-change materials and chalcogenides

paper · pdf · doi:10.48550/arxiv.2309.14797

openalex publication_date 2023/09/26 · openalex created_date 2023/09/29 · openalex updated_date 2026/07/28

Abstract

We use the thickness of Cu layers to control all-optical switching of magnetization in adjacent Gd₂₄(Fe₉0Co₁₀)₇₆ films. While increasing the Cu thickness from 5 to 900nm has no effect on the switching threshold, it significantly enlarges the fluence and pulse duration at which multiple domains emerge. Having shown that thermally activated multi-domain formation limits the maximum fluence and pulse duration for controlled switching, we demonstrate that continuous magnetization reversal precedes multi-domain formation in Gd₁₈Dy₄Co₇₈ films excited with fluences slightly larger than the multi-domain threshold.

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