Current-Induced Crystallisation in a Heusler-Alloy-Based Giant Magnetoresistive Junction for Neuromorphic Potentiation

Zhenyu Zhou; William James Frost; David Lloyd; Takeshi Seki; Takahide Kubota; Rafael Ramos; Eiji Saitoh; Koki Takanashi; Atsufumi Hirohata

doi:10.1016/j.jmmm.2023.170575

Current-Induced Crystallisation in a Heusler-Alloy-Based Giant Magnetoresistive Junction for Neuromorphic Potentiation

Zhenyu Zhou, William James Frost, David Lloyd, Takeshi Seki, Takahide Kubota, Rafael Ramos, Eiji Saitoh, Koki Takanashi, Atsufumi Hirohata

Research output: Contribution to journal › Review article › peer-review

Abstract

Recent development in neuromorphic computation allows us to achieve low power and highly efficient calculations better than the conventional von Neumann computation. In order to achieve realistic synaptic operation, potentiation to add weighting to strengthen a selected artificial synapse. Such functionality can be achieved by reducing the electrical resistance of the artificial synapse. Recently, a ferromagnetic Heusler alloy used in a magnetoresistive junction has been demonstrated to crystallise via the layer-by-layer mode by introducing an electrical current pulse. In this study, we have extended the current-induced crystallisation to a junction with epitaxially-grown Heusler alloy after post-annealing for crystallisation. By combining this potentiation functionality with the neuromorphic operation, realistic synaptic computation can be developed.

Original language	English
Journal	Journal of Magnetism and Magnetic Materials
Early online date	27 Feb 2023
DOIs	https://doi.org/10.1016/j.jmmm.2023.170575
Publication status	E-pub ahead of print - 27 Feb 2023

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10.1016/j.jmmm.2023.170575Licence: CC BY

potentiation_230212
© 2023 The Author(s). Published by Elsevier B.V.
Accepted author manuscript, 339 KBLicence: CC BY

Cite this

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title = "Current-Induced Crystallisation in a Heusler-Alloy-Based Giant Magnetoresistive Junction for Neuromorphic Potentiation",

abstract = "Recent development in neuromorphic computation allows us to achieve low power and highly efficient calculations better than the conventional von Neumann computation. In order to achieve realistic synaptic operation, potentiation to add weighting to strengthen a selected artificial synapse. Such functionality can be achieved by reducing the electrical resistance of the artificial synapse. Recently, a ferromagnetic Heusler alloy used in a magnetoresistive junction has been demonstrated to crystallise via the layer-by-layer mode by introducing an electrical current pulse. In this study, we have extended the current-induced crystallisation to a junction with epitaxially-grown Heusler alloy after post-annealing for crystallisation. By combining this potentiation functionality with the neuromorphic operation, realistic synaptic computation can be developed.",

author = "Zhenyu Zhou and Frost, {William James} and David Lloyd and Takeshi Seki and Takahide Kubota and Rafael Ramos and Eiji Saitoh and Koki Takanashi and Atsufumi Hirohata",

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T1 - Current-Induced Crystallisation in a Heusler-Alloy-Based Giant Magnetoresistive Junction for Neuromorphic Potentiation

AU - Zhou, Zhenyu

AU - Frost, William James

AU - Lloyd, David

AU - Seki, Takeshi

AU - Kubota, Takahide

AU - Ramos, Rafael

AU - Saitoh, Eiji

AU - Takanashi, Koki

AU - Hirohata, Atsufumi

PY - 2023/2/27

Y1 - 2023/2/27

N2 - Recent development in neuromorphic computation allows us to achieve low power and highly efficient calculations better than the conventional von Neumann computation. In order to achieve realistic synaptic operation, potentiation to add weighting to strengthen a selected artificial synapse. Such functionality can be achieved by reducing the electrical resistance of the artificial synapse. Recently, a ferromagnetic Heusler alloy used in a magnetoresistive junction has been demonstrated to crystallise via the layer-by-layer mode by introducing an electrical current pulse. In this study, we have extended the current-induced crystallisation to a junction with epitaxially-grown Heusler alloy after post-annealing for crystallisation. By combining this potentiation functionality with the neuromorphic operation, realistic synaptic computation can be developed.

AB - Recent development in neuromorphic computation allows us to achieve low power and highly efficient calculations better than the conventional von Neumann computation. In order to achieve realistic synaptic operation, potentiation to add weighting to strengthen a selected artificial synapse. Such functionality can be achieved by reducing the electrical resistance of the artificial synapse. Recently, a ferromagnetic Heusler alloy used in a magnetoresistive junction has been demonstrated to crystallise via the layer-by-layer mode by introducing an electrical current pulse. In this study, we have extended the current-induced crystallisation to a junction with epitaxially-grown Heusler alloy after post-annealing for crystallisation. By combining this potentiation functionality with the neuromorphic operation, realistic synaptic computation can be developed.

U2 - 10.1016/j.jmmm.2023.170575

DO - 10.1016/j.jmmm.2023.170575

M3 - Review article

SN - 0304-8853

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

ER -