首页|The Combined Effect of Spin-Transfer Torque and Voltage-Controlled Strain Gradient on Magnetic Domain-Wall Dynamics:Toward Tunable Spintronic Neuron

The Combined Effect of Spin-Transfer Torque and Voltage-Controlled Strain Gradient on Magnetic Domain-Wall Dynamics:Toward Tunable Spintronic Neuron

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Magnetic domain wall(DW),as one of the promising information carriers in spintronic devices,have been widely investigated owing to its nonlinear dynamics and tunable properties.Here,we theoretically and numerically demonstrate the DW dynamics driven by the synergistic interaction between current-induced spin-transfer torque(STT)and voltage-controlled strain gradient(VCSG)in multiferroic heterostructures.Through electromechanical and micromagnetic simulations,we show that a desirable strain gradient can be created and it further modulates the equilibrium position and velocity of the current-driven DW motion.Meanwhile,an analytical Thiele's model is developed to describe the steady motion of DW and the analytical results are quite consistent with the simulation data.Finally,we find that this combination effect can be leveraged to design DW-based biological neurons where the synergistic interaction between STT and VCSG-driven DW motion as integrating and leaking motivates mimicking leaky-integrate-and-fire(LIF)and self-reset function.Importantly,the firing response of the LIF neuron can be efficiently modulated,facilitating the exploration of tunable activation function generators,which can further help improve the computational capability of the neuromorphic system.

郁国良、何鑫岩、施胜宾、邱阳、朱明敏、王嘉维、李燕、李元勋、王杰、周浩淼

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College of Information Engineering,China Jiliang University,Hangzhou 310018,China

The Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province,Hangzhou 310018,China

Department of Engineering Mechanics,Zhejiang University,Hangzhou 310027,China

School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China

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国家自然科学基金国家自然科学基金国家自然科学基金浙江省自然科学基金浙江省自然科学基金浙江省自然科学基金Fundamental Research Funds for the Provincial Universities of ZhejiangFundamental Research Funds for the Provincial Universities of ZhejiangStartup Foundation and Young Science and Technology Talent Program from China Jiliang UniversityKey Labora-tory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province

519023001197233311902316LY21F010011LZ19A020001LZ23A0200022021YW022022YW88

2024

10.1088/0256-307X/41/5/057502

中国物理快报(英文版)
中国科学院物理研究所,中国物理学会

中国物理快报(英文版)

CSTPCDEI
影响因子：0.515
ISSN：0256-307X
年,卷(期)：2024.41(5)
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