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

作　　者：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 Guo-Liang Yu;Xin-Yan He;Sheng-Bin Shi;Yang Qiu;Ming-Min Zhu;Jia-Wei Wang;Yan Li;Yuan-Xun Li;Jie Wang;Hao-Miao Zhou(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)

机构地区：[1]College of Information Engineering,China Jiliang University,Hangzhou 310018,China [2]The Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province,Hangzhou 310018,China [3]Department of Engineering Mechanics,Zhejiang University,Hangzhou 310027,China [4]School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China

出　　处：《Chinese Physics Letters》2024年第5期120-137,共18页中国物理快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 51902300, 11972333, and 11902316);the Zhejiang Provincial Natural Science Foundation of China (Grant Nos. LY21F010011, LZ19A020001, and LZ23A020002);the Fundamental Research Funds for the Provincial Universities of Zhejiang (Grant Nos. 2021YW02 and 2022YW88)。

摘　　要：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.

关 键 词：TUNABLE SYNERGISTIC integrating 

分 类 号：O469[理学—凝聚态物理]