Efficient Charge‐to‐Orbit Current Conversion for Orbital Torque Based Artificial Neurons and Synapses

Abstract Orbital Hall effect (OHE) in light metal materials has attracted significant attention due to its potential applications in innovative orbitronic devices. Here, the OHE in titanium film is investigated and the orbital torque efficiency in Pt/[Co/Ni] 3 /Ti multilayers is characterized. A notable effective field per unit current density of orbital torque is achieved, nearing 560 Oe per 10 7 A cm −2 in a sample featuring 25 nm Ti layer. The corresponding orbital torque efficiency is ≈0.25. The resulting orbital torque effectively switches the perpendicularly magnetized moments in Co/Ni multilayers. In contrast, a reference sample of Pt/[Co/Ni] 3 /Pt demonstrates significantly lower switching efficiency. Furthermore, it is demonstrated that the multi‐states switching driven by orbital torque in Pt/[Co/Ni] 3 /Ti structure can mimic the behaviors of artificial neurons and synapses. This work not only enhances the understanding of the orbital torque but also offers the development of novel orbitronic devices based on OHE.

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Publication Details

Journal
Advanced Electronic Materials
Published
2024-12-04
DOI
https://doi.org/10.1002/aelm.202400721
Citations
4
Primary Topic
Advanced Memory and Neural Computing
Type
article
Field-Weighted Citation Impact
0.83

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article

Efficient Charge‐to‐Orbit Current Conversion for Orbital Torque Based Artificial Neurons and Synapses

Huiliang Wu, Jinwu Wei, Bin He, Quwen Wang et al.
4 citations
Advanced Electronic Materials
Advanced Memory and Neural Computing
0.83
article

Efficient Charge‐to‐Orbit Current Conversion for Orbital Torque Based Artificial Neurons and Synapses

Huiliang Wu, Jinwu Wei, Bin He, Quwen Wang, Chenbo Zhao, Qian Zhao, Jianbo Wang, Guoqiang Yu, X. Luo, Pan Liu, Zimu Li, Qingfang Liu, Tengfei Zhang
article en
4 citations

Abstract

Abstract Orbital Hall effect (OHE) in light metal materials has attracted significant attention due to its potential applications in innovative orbitronic devices. Here, the OHE in titanium film is investigated and the orbital torque efficiency in Pt/[Co/Ni] 3 /Ti multilayers is characterized. A notable effective field per unit current density of orbital torque is achieved, nearing 560 Oe per 10 7 A cm −2 in a sample featuring 25 nm Ti layer. The corresponding orbital torque efficiency is ≈0.25. The resulting orbital torque effectively switches the perpendicularly magnetized moments in Co/Ni multilayers. In contrast, a reference sample of Pt/[Co/Ni] 3 /Pt demonstrates significantly lower switching efficiency. Furthermore, it is demonstrated that the multi‐states switching driven by orbital torque in Pt/[Co/Ni] 3 /Ti structure can mimic the behaviors of artificial neurons and synapses. This work not only enhances the understanding of the orbital torque but also offers the development of novel orbitronic devices based on OHE.

Advanced Electronic MaterialsVol. 11(7)
Chinese Academy of Sciences (CN), Lanzhou University of Technology (CN), Energy Foundation (CN), Institute of Physics (CN), University of Chinese Academy of Sciences (CN)
National Natural Science Foundation of China, Natural Science Foundation of Gansu Province, Natural Science Foundation of Sichuan Province
Affordable and clean energy
Openalex Percentile: Top 26%
Advanced Memory and Neural Computing
0.83
DOIOpen Access PDFOpenAlex
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