Enhancing All-Optical Switching of Magnetization by He Ion Irradiation

Pingzhi Li; J.W. van der Jagt; Maarten Beens; Julian Hintermayr; Marcel A. Verheijen; René Bruikman; Beatriz Barcones Campo; Roméo Juge; Reinoud Lavrijsen; Dafiné Ravelosona; Bert Koopmans

doi:10.1063/5.0111466

Enhancing All-Optical Switching of Magnetization by He Ion Irradiation

Pingzhi Li (Corresponding author), J.W. van der Jagt, Maarten Beens, Julian Hintermayr, Marcel A. Verheijen, René Bruikman, Beatriz Barcones Campo, Roméo Juge, Reinoud Lavrijsen, Dafiné Ravelosona, Bert Koopmans

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Abstract

All-optical switching (AOS) of magnetization by a single femtosecond laser pulse in Co/Gd based synthetic
ferrimagnets is the fastest magnetization switching process. On the other hand, He ion irradiation has
become a promising tool for interface engineering of spintronic material platforms, giving rise to significant
modification of magnetic properties. In this paper, we explore the use of He ion irradiation to enhance single
pulse AOS of Co/Gd bilayer-based synthetic ferrimagnets. The intermixing of the constituent magnetic layers
by He ion irradiation was both numerically simulated and experimentally verified. We theoretically modelled
the effects of intermixing on AOS using the layered microscopic 3-temperature model and found that AOS is
enhanced significantly by breaking the pristine Co/Gd interface through intermixing. Following this notion,
we studied the threshold fluence of AOS as a function of He ion irradiation fluence. We found that the AOS
threshold fluence can be reduced by almost 30%. Our study reveals the control of AOS by He ion irradiation,
which opens up an industrially compatible approach for local AOS engineering.

Original language	English
Article number	172404
Number of pages	6
Journal	Applied Physics Letters
Volume	121
Issue number	17
DOIs	https://doi.org/10.1063/5.0111466
Publication status	Published - 26 Oct 2022

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title = "Enhancing All-Optical Switching of Magnetization by He Ion Irradiation",

abstract = "All-optical switching (AOS) of magnetization by a single femtosecond laser pulse in Co/Gd based syntheticferrimagnets is the fastest magnetization switching process. On the other hand, He ion irradiation hasbecome a promising tool for interface engineering of spintronic material platforms, giving rise to significantmodification of magnetic properties. In this paper, we explore the use of He ion irradiation to enhance singlepulse AOS of Co/Gd bilayer-based synthetic ferrimagnets. The intermixing of the constituent magnetic layersby He ion irradiation was both numerically simulated and experimentally verified. We theoretically modelledthe effects of intermixing on AOS using the layered microscopic 3-temperature model and found that AOS isenhanced significantly by breaking the pristine Co/Gd interface through intermixing. Following this notion,we studied the threshold fluence of AOS as a function of He ion irradiation fluence. We found that the AOSthreshold fluence can be reduced by almost 30%. Our study reveals the control of AOS by He ion irradiation,which opens up an industrially compatible approach for local AOS engineering.",

author = "Pingzhi Li and {van der Jagt}, J.W. and Maarten Beens and Julian Hintermayr and Verheijen, {Marcel A.} and Ren{\'e} Bruikman and {Barcones Campo}, Beatriz and Rom{\'e}o Juge and Reinoud Lavrijsen and Dafin{\'e} Ravelosona and Bert Koopmans",

year = "2022",

month = oct,

day = "26",

doi = "10.1063/5.0111466",

language = "English",

volume = "121",

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T1 - Enhancing All-Optical Switching of Magnetization by He Ion Irradiation

AU - Li, Pingzhi

AU - van der Jagt, J.W.

AU - Beens, Maarten

AU - Hintermayr, Julian

AU - Verheijen, Marcel A.

AU - Bruikman, René

AU - Barcones Campo, Beatriz

AU - Juge, Roméo

AU - Lavrijsen, Reinoud

AU - Ravelosona, Dafiné

AU - Koopmans, Bert

PY - 2022/10/26

Y1 - 2022/10/26

N2 - All-optical switching (AOS) of magnetization by a single femtosecond laser pulse in Co/Gd based syntheticferrimagnets is the fastest magnetization switching process. On the other hand, He ion irradiation hasbecome a promising tool for interface engineering of spintronic material platforms, giving rise to significantmodification of magnetic properties. In this paper, we explore the use of He ion irradiation to enhance singlepulse AOS of Co/Gd bilayer-based synthetic ferrimagnets. The intermixing of the constituent magnetic layersby He ion irradiation was both numerically simulated and experimentally verified. We theoretically modelledthe effects of intermixing on AOS using the layered microscopic 3-temperature model and found that AOS isenhanced significantly by breaking the pristine Co/Gd interface through intermixing. Following this notion,we studied the threshold fluence of AOS as a function of He ion irradiation fluence. We found that the AOSthreshold fluence can be reduced by almost 30%. Our study reveals the control of AOS by He ion irradiation,which opens up an industrially compatible approach for local AOS engineering.

AB - All-optical switching (AOS) of magnetization by a single femtosecond laser pulse in Co/Gd based syntheticferrimagnets is the fastest magnetization switching process. On the other hand, He ion irradiation hasbecome a promising tool for interface engineering of spintronic material platforms, giving rise to significantmodification of magnetic properties. In this paper, we explore the use of He ion irradiation to enhance singlepulse AOS of Co/Gd bilayer-based synthetic ferrimagnets. The intermixing of the constituent magnetic layersby He ion irradiation was both numerically simulated and experimentally verified. We theoretically modelledthe effects of intermixing on AOS using the layered microscopic 3-temperature model and found that AOS isenhanced significantly by breaking the pristine Co/Gd interface through intermixing. Following this notion,we studied the threshold fluence of AOS as a function of He ion irradiation fluence. We found that the AOSthreshold fluence can be reduced by almost 30%. Our study reveals the control of AOS by He ion irradiation,which opens up an industrially compatible approach for local AOS engineering.

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DO - 10.1063/5.0111466

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VL - 121

JO - Applied Physics Letters

JF - Applied Physics Letters

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M1 - 172404

ER -

Enhancing All-Optical Switching of Magnetization by He Ion Irradiation

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