Tuneable stochastic domain-wall trajectories in a nanoscale magnetic Galton board

Dedalo Sanz-Hernandez; Maryam Massouras; Nicolas Reyren; Nicolas Rougemaille; Vojtěch Schánilec; Karim Bouzehouane; Michel Hehn; Benjamin Canals; Damien Querlioz; Julie Grollier; François Montaigne; Daniel Lacour

doi:10.1117/12.2596038

1 August 2021 Tuneable stochastic domain-wall trajectories in a nanoscale magnetic Galton board

Dedalo Sanz-Hernandez, Maryam Massouras, Nicolas Reyren, Nicolas Rougemaille, Vojtěch Schánilec, Karim Bouzehouane, Michel Hehn, Benjamin Canals, Damien Querlioz, Julie Grollier, François Montaigne, Daniel Lacour

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Proceedings Volume 11805, Spintronics XIV; 118051H (2021) https://doi.org/10.1117/12.2596038
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Abstract

In this work , we describe the design, realisation and characterization of the magnetic version of the Galton Board, an archetypal statistical device originally designed to exemplify normal distributions. Although simple in its macroscopic form, achieving an equivalent nanoscale system poses many challenges related to the generation of sufficiently similar nanometric particles and the strong influence that nanoscale defects can have in the stochasticity of random processes. We demonstrate how the quasi-particle nature and the chaotic dynamics of magnetic domain-walls can be harnessed to create nanoscale stochastic devices [1]. Furthermore, we show how the direction of an externally applied magnetic field can be employed to controllably tune the probability distribution at the output of the devices, and how the removal of elements inside the array can be used to modify such distribution.

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Dedalo Sanz-Hernandez, Maryam Massouras, Nicolas Reyren, Nicolas Rougemaille, Vojtěch Schánilec, Karim Bouzehouane, Michel Hehn, Benjamin Canals, Damien Querlioz, Julie Grollier, François Montaigne, and Daniel Lacour "Tuneable stochastic domain-wall trajectories in a nanoscale magnetic Galton board", Proc. SPIE 11805, Spintronics XIV, 118051H (1 August 2021); https://doi.org/10.1117/12.2596038

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KEYWORDS

Magnetism

Stochastic processes

Image processing

Microscopy

Nanowires

Magnetic tracking

Magneto-optics

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