The role of intermixing in all-optical switching of synthetic-ferrimagnetic multilayers

M. Beens; M. L.M. Lalieu; R. A. Duine; B. Koopmans

doi:10.1063/1.5129892

The role of intermixing in all-optical switching of synthetic-ferrimagnetic multilayers

M. Beens^*, M. L.M. Lalieu, R. A. Duine, B. Koopmans

^*Corresponding author for this work

Eindhoven University of Technology

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

We present a theoretical study of single-pulse all-optical switching (AOS) in synthetic-ferrimagnetic multilayers. Specifically, we investigate the role of interface intermixing in switching Co/Gd bilayers. We model the laser-induced magnetization dynamics in Co/Gd bilayers using the microscopic three-temperature model for layered magnetic systems. Exchange scattering is included, which mediates angular momentum transfer between the magnetic sublattices. In this work, each layer is represented by one atomic monolayer of a GdCo alloy with an arbitrary Co concentration, allowing Co/Gd bilayers with an intermixed interface to be modelled. Our results indicate that within the model intermixing of the Co/Gd interface reduces the threshold fluence for AOS significantly. We show that intermixing does not qualitatively affect the switching mechanism and leads to an increase of the propagation speed of the switching front.

Original language	English
Article number	125133
Journal	AIP Advances
Volume	9
Issue number	12
DOIs	https://doi.org/10.1063/1.5129892
Publication status	Published - 1 Dec 2019

Funding

This work was part of the research programme of the Foundation for Fundamental Research on Matter (FOM), which is part of the Netherlands Organisation for Scientific Research (NWO).

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abstract = "We present a theoretical study of single-pulse all-optical switching (AOS) in synthetic-ferrimagnetic multilayers. Specifically, we investigate the role of interface intermixing in switching Co/Gd bilayers. We model the laser-induced magnetization dynamics in Co/Gd bilayers using the microscopic three-temperature model for layered magnetic systems. Exchange scattering is included, which mediates angular momentum transfer between the magnetic sublattices. In this work, each layer is represented by one atomic monolayer of a GdCo alloy with an arbitrary Co concentration, allowing Co/Gd bilayers with an intermixed interface to be modelled. Our results indicate that within the model intermixing of the Co/Gd interface reduces the threshold fluence for AOS significantly. We show that intermixing does not qualitatively affect the switching mechanism and leads to an increase of the propagation speed of the switching front.",

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AU - Duine, R. A.

AU - Koopmans, B.

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The role of intermixing in all-optical switching of synthetic-ferrimagnetic multilayers

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