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Mechanism of field-like torque in spin-orbit torque switching of perpendicular magnetic tunnel junction

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Science China(Physics,Mechanics & Astronomy) 2022年第10期65卷 109-114页

作者： Yudong Zhuo Wenlong Cai Daoqian Zhu Hongchao Zhang Ao Du Kaihua Cao jialiang yin Yan Huang Kewen Shi Weisheng Zhao Fert Beijing Institute MIIT Key Laboratory of SpintronicsSchool of Integrated Circuit Science and EngineeringBeihang UniversityBeijing 100191China Beihang-Goertek Joint Microelectronics Institute Qingdao Research InstituteBeihang UniversityQingdao 266000China

The current-induced spin-orbit torque(SOT) is one of the most promising ways for high speed and low power spintronics devices. However, the mechanism of SOT driven magnetization reversal, especially the role of the field-like torque(FLT), is still unclear. Here, we report the observed promotion and suppression of switching by FLT, which depends on the relative direction of FLT and spin polarization. Our results reveal that the FLT could modulate the switching speed and power consumption by affecting the work done by the damping-like torque, and leads two different reversal dynamical paths during the ***, the origin of incubation time in SOT induced switching is clarified simultaneously.

关键词： spin-orbit torque field-like torque magnetization reversal magnetic tunnel junction

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Tunneling magnetoresistance materials and devices for neuromorphic computing

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Materials Futures 2023年第3期2卷 90-113页

作者： Yuxuan Yao Houyi Cheng Boyu Zhang jialiang yin Daoqian Zhu Wenlong Cai Sai Li Weisheng Zhao Fert Beijing Institute MIIT Key Laboratory of SpintronicsSchool of Integrated Circuit Science and EngineeringBeihang UniversityBeijing 100191People’s Republic of China Hefei Innovation Research Institute Anhui High Reliability Chips Engineering LaboratoryBeihang UniversityHefei 230013People’s Republic of China Truth Equipment Corporation TRECHefei 230013People’s Republic of China Beihang-Geortek Joint Microelectronics Institute Qingdao Research InstituteBeihang UniversityQingdao 266061People’s Republic of China

Artificial intelligence has become indispensable in modern life,but its energy consumption has become a significant concern due to its huge storage and computational *** intelligence algorithms are mainly based on deep learning algorithms,relying on the backpropagation of convolutional neural networks or binary neural *** these algorithms aim to simulate the learning process of the human brain,their low bio-fidelity and the separation of storage and computing units lead to significant energy *** human brain is a remarkable computing machine with extraordinary capabilities for recognizing and processing complex information while consuming very low *** magnetoresistance(TMR)-based devices,namely magnetic tunnel junctions(MTJs),have great advantages in simulating the behavior of biological synapses and *** is not only because MTJs can simulate biological behavior such as spike-timing dependence plasticity and leaky integrate-fire,but also because MTJs have intrinsic stochastic and oscillatory *** characteristics improve MTJs’bio-fidelity and reduce their power *** also possess advantages such as ultrafast dynamics and non-volatile properties,making them widely utilized in the field of neuromorphic computing in recent *** conducted a comprehensive review of the development history and underlying principles of TMR,including a detailed introduction to the material and magnetic properties of MTJs and their temperature *** also explored various writing methods of MTJs and their potential ***,we provided a thorough analysis of the characteristics and potential applications of different types of MTJs for neuromorphic ***-based devices have demonstrated promising potential for broad application in neuromorphic computing,particularly in the development of spiking neural *** ability to perform on-chip learning with ultra-low power consumpt

关键词： spintronics TMR MTJ neuromorphic computing SNN

Implementation of 16 Boolean logic operations based on one basic cell of spin-transfer-torque magnetic random access memory

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Science China(Information Sciences) 2023年第6期66卷 250-257页

作者： Yan HUANG Kaihua CAO Kun ZHANG Jinkai WANG Kewen SHI Zuolei HAO Wenlong CAI Ao DU jialiang yin Qing YANG Junfeng LI Jianfeng GAO Chao ZHAO Weisheng ZHAO Fert Beijing Institute MIIT Key Laboratory of SpintronicsSchool of Integrated Circuit Science and EngineeringBeihang University Institute of Microelectronics of the Chinese Academy of Sciences Beihang-Goertek Joint Microelectronics Institute Qingdao Research InstituteBeihang University

In-memory computing(IMC)systems based on emerging nonvolatile memories(NVMs)provide a thorough solution for memory wall issues and von Neumann bottlenecks. Massive IMC schemes have been proposed by utilizing ingenious structures and additional auxiliary components. However, these schemes are not compatible with the basic cell(one memory unit and one transistor)of emerging random-access memory(RAM), which goes against low-power and high-density requirements. In this paper, we propose a logic implementation scheme based on one magnetic tunnel junction and one transistor(1MTJ-1T), which is the basic cell of spin-transfer-torque magnetic RAM(STT-MRAM). With no other assistance, complete 16 logic operations can be accomplished in two steps with their logic outputs in-situ stored in the MTJ. The area(0.2 μm2)and energy consumption per logic operation(1.1–2.6 pJ)of the logic gates under 14 nm process node are evaluated using SPICE simulations, indicating its excellent performance. Our work exhibits a 1MTJ-1Tbased logic operation implementation, which can bridge the gap between STT-MRAM and high-performance IMC applications.

关键词： in-memory computing logic operation magnetic tunnel junctions transistor spin transfer torque

Observation of magnetic droplets in magnetic tunnel junctions

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Science China(Physics,Mechanics & Astronomy) 2022年第2期65卷 99-105页

作者： Kewen Shi Wenlong Cai Sheng Jiang Daoqian Zhu Kaihua Cao Zongxia Guo Jiaqi Wei Ao Du Zhi Li Yan Huang jialiang yin Johan Akerman Weisheng Zhao Fert Beijing Institute M1IT Key Laboratory of SpintronicsSchool of Integrated Circuit Science and EngineeringBeihang UniversityBeijing 100191China Beihang-Goertek Joint Microelectronics Institute Qingdao Research InstituteBeihang UniversityQingdao 266000China Department of Physics University of GothenburgGothenburg 41296Sweden Department of Applied Physics School of Engineering Sciences.KTH Royal Institute of TechnologyKista 16440Sweden School of Microelectronics Northwestern Poly technical UniversityXi'an 710072China

Magnetic droplets,a class of highly nonlinear magnetodynamic solitons,can be nucleated and stabilized in nanocontact spintorque *** we experimentally demonstrate magnetic droplets in magnetic tunnel junctions(MTJs).The droplet nucleation is accompanied by power enhancement compared with its ferromagnetic resonance *** nucleation and stabilization of droplets are ascribed to the double-Co Fe B free-layer structure in the all-perpendicular MTJ,which provides a low Zhang-Li torque and a high pinning *** results enable better electrical sensitivity in fundamental studies of droplets and show that the droplets can be utilized in MTJ-based applications and materials science.

关键词： spin-torque nano-oscillators magnetic droplets spin dynamics magnetic tunnel junctions

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Integration of high-performance spin-orbit torque MRAM devices by 200-mm-wafer manufacturing platform

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Journal of Semiconductors 2022年第10期43卷 64-72页

作者： Hongchao Zhang Xiangyue Ma Chuanpeng Jiang jialiang yin Shuqin Lyu Shiyang Lu Xiantao Shang Bowen Man Cong Zhang Dandan Li Shuhui Li Wenjing Chen Hongxi Liu Gefei Wang Kaihua Cao Zhaohao Wang Weisheng Zhao Fert Beijing Institute School of Integrated Science and EngineeringBeihang UniversityBeijing 100191China Truth Memory Tech.Corporation Beijing 100088China Beihang-Goertek Joint Microelectronics Institute Qingdao Research InstituteBeihang UniversityQingdao 266000China

We demonstrate in-plane field-free-switching spin-orbit torque(SOT)magnetic tunnel junction(MTJ)devices that are capable of low switching current density,fast speed,high reliability,and,most importantly,manufactured uniformly by the 200-mm-wafer *** performance of the devices is systematically studied,including their magnetic properties,switch-ing behaviors,endurance and data *** successful integration of SOT devices within the 200-mm-wafer manufactur-ing platform provides a feasible way to industrialize SOT *** is expected to obtain excellent performance of the devices by further optimizing the MTJ film stacks and the corresponding fabrication processes in the future.

关键词： SOT MTJ low switching current densities 200-mm-wafer platform endurance data retention

中药配方颗粒治疗痰热阻肺型慢性阻塞性肺疾病急性加重期患者的有效性和安全性

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西部中医药 2021年第6期34卷 89-91页

作者：尹加亮童佳兵六安市第二人民医院安徽六安237008 安徽中医药大学第一附属医院

目的:观察中药配方颗粒剂治疗慢性阻塞性肺疾病(chronic obstructive pulmonary dis-ease,COPD)急性加重期的临床疗效。方法:将80例COPD急性加重期患者随机分为观察组和对照组,每组40例。两组中药处方均为清气化痰丸合贝母瓜蒌散加减,... 详细信息

目的:观察中药配方颗粒剂治疗慢性阻塞性肺疾病(chronic obstructive pulmonary dis-ease,COPD)急性加重期的临床疗效。方法:将80例COPD急性加重期患者随机分为观察组和对照组,每组40例。两组中药处方均为清气化痰丸合贝母瓜蒌散加减,观察组给予中药配方颗粒剂+西医基础治疗,对照组给予中药饮片+西医基础治疗。比较两组中医临床症状积分、生存质量评分、呼吸困难评分、炎性生化指标及临床疗效。结果:同组治疗前后中医临床症状积分、生存质量评分、呼吸困难评分、炎性生化指标比较,差异有统计学意义(P0.05)。结论:两种不同中药剂型均能改善COPD急性加重期的临床症状,减低炎性指标水平,提高临床疗效。

关键词：阻塞性肺疾病,慢性痰热阻肺中药配方颗粒急性加重期

经皮微创内固定术治疗四肢粉碎性骨折的临床应用效果观察

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大医生 2020年第12期5卷 27-30页

作者：尹家亮陆福男沈国梁苏州市吴中区甪直人民医院江苏苏州215127

目的探讨对四肢粉碎性骨折患者施行经皮微创内固定术法治疗的应用价值。方法将苏州市吴中区甪直人民医院2018年1月至2020年1月收治的四肢粉碎性骨折120例患者作为研究对象,按照随机自愿原则分为研究组(60例)与对照组(60例)。研究组采取... 详细信息

目的探讨对四肢粉碎性骨折患者施行经皮微创内固定术法治疗的应用价值。方法将苏州市吴中区甪直人民医院2018年1月至2020年1月收治的四肢粉碎性骨折120例患者作为研究对象,按照随机自愿原则分为研究组(60例)与对照组(60例)。研究组采取经皮微创内固定术,对照组采取传统钢板固定术。对比两组患者的临床手术指标、术后血清炎症因子、临床疗效及并发症发生情况等。结果在手术指标方面,研究组患者术中出血量、手术时间、伤口愈合时间、术后疼痛评分等指标均优于对照组,组间比较差异有统计学意义(P<0.05);在术后血清炎症因子方面,研究组患者降钙素原、术后1~3天的C反应蛋白等指标均低于对照组,组间比较差异有统计学意义(P<0.05);在临床疗效方面,研究组指标显著优于对照组,组间比较差异有统计学意义(P<0.05);在并发症出现状况方面,研究组显著低于对照组,组间比较差异有统计学意义(P<0.05)。结论四肢粉碎性骨折患者行经皮微创内固定术治疗,可以降低患者的术后炎症反应和并发症的出现状况,减轻患者的术后痛苦,缩短患者手术时间,帮助患者进一步恢复,使患者的术后生活质量显著提升。

关键词：微创内固定术四肢粉碎性骨折钢板固定术

黄连温胆汤联合前列地尔对脑梗死合并糖尿病患者的疗效及sICAM⁃1的影响

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分子诊断与治疗杂志 2023年第9期15卷 1618-1621,1626页

作者：江应露尹加亮李学军皖西卫生职业学院附属医院中医科安徽六安237000

目的探讨黄连温胆汤联合前列地尔对脑梗死合并糖尿病患者的疗效及可溶性细胞间粘附分子(sICAM⁃a)的影响。方法将皖西卫生职业学院附属医院中医科收治的脑梗死合并糖尿病患者90例,随机分为两组,各45例。对照组采用前列地尔治疗;观察组采... 详细信息

目的探讨黄连温胆汤联合前列地尔对脑梗死合并糖尿病患者的疗效及可溶性细胞间粘附分子(sICAM⁃a)的影响。方法将皖西卫生职业学院附属医院中医科收治的脑梗死合并糖尿病患者90例,随机分为两组,各45例。对照组采用前列地尔治疗;观察组采用黄连温胆汤联合前列地尔治疗,持续治疗2周为一疗程。干预前后采血测定空腹血糖(FBG)、餐后2 h血糖(2 hPG)、空腹胰岛素(FINS)、胰岛素抵抗指数(HOMA⁃IR)及可溶性细胞间黏附分子⁃1(sICAM⁃a)、可溶性血管粘附分子(sVCAM⁃a)的水平,比较两组间的临床疗效。结果与干预前比,两组干预后FBG、2hPG及HOMA⁃IR降低;观察组干预后FBG、2hPG及HOMA⁃IR低于对照组,差异有统计学意义(t=7.467、13.129、12.536,P<0.05)。与干预前比,两组干预后血sICAM⁃1、sVCAM⁃1水平降低;观察组患者干预后血sICAM⁃1、sVCAM⁃1水平低于对照组,差异有统计学意义(t=20.230、23.314,P<0.05)。两组治疗后干预1周、干预2周NIHSS评分均较治疗前降低;与对照组比较观察组干预1周、干预2周NIHSS评分较低,差异有统计学意义(t值=4.149,P<0.05)。相比对照组有效率77.78%,观察组的总有效率93.33%较高,差异有统计学意义(χ^(2)=4.406,P<0.05)。与干预前比,两组干预后脑梗死面积缩小;观察组患者干预后脑梗死面积低于对照组,差异有统计学意义(t值=17.810,P<0.05)。结论黄连温胆汤联合前列地尔对脑梗死合并糖尿病患者的疗效确切,有助于改善血糖和神经功能,降低血sICAM⁃1、sVCAM⁃1水平。

关键词：黄连温胆汤前列地尔脑梗死合并糖尿病 sICAM⁃1

Distribution of micropeptide-coding sORFs in transcripts

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Chinese Chemical Letters 2018年第7期29卷 1029-1032页

作者： Xinqiang yin jialiang Hu Hanmei Xu The Engineering Research Center of Peptide Drug Discovery and Development China Pharmaceutical University The Basic Medical School North Sichuan Medical College State Key Laboratory of Natural Medicines Ministry of Education China Pharmaceutical University

Small open reading frames(sORFs) are distributed over a wide variety of transcripts. sORFs encoding functional peptides have been identified in various configurations within apparently long noncoding RNAs. Many translated sORFs have been identified across mRNAs, including 5’-upstream, coding domain, and 3’-downstream. sORFs have also been found in circular RNAs, pri-miRNAs, and ribosomal RNAs. Here, we present an overview of the wide distribution of the sORFs in transcripts and their functional roles in organisms.

关键词： Micropeptide sORFs uORFs ncRNA circRNAs Pri-miRNAs