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magnetic skyrmions:materials,manipulation,detection,and applications in spintronic devices

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Materials Futures 2023年第3期2卷 53-71页

作者： Huai Zhang Yajiu Zhang Zhipeng Hou Minghui Qin Xingsen Gao Junming Liu Guangdong Provincial Key Laboratory of Optical Information Materials and Technology Institute for Advanced MaterialsSouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006People’s Republic of China School of Civil Engineering Guangzhou UniversityGuangzhou 510006People’s Republic of China Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 211102People’s Republic of China

magnetic skyrmions are vortex-like spin configurations that possess nanometric dimensions,topological stability,and high controllability through various external *** their first experimental observation in helimagnet MnSi in 2009,magnetic skyrmions have emerged as a highly promising candidate for carrying information in future high-performance,low-energy-consumption,non-volatile information storage,and logical *** this article,we provide a comprehensive review of the progress made in the field of magnetic skyrmions,specifically in materials,manipulation,detection,and application in spintronic ***,we introduce several representative skyrmion material systems,including chiral magnets,magnetic thin films,centrosymmetric materials,and Van der Waals *** then discuss various methods for manipulating magnetic skyrmions,such as electric current and electric field,as well as detecting them,mainly through electrical means such as the magnetoresistance ***,we explore device applications based on magnetic skyrmions,such as track memory,logic computing,and neuromorphic ***,we summarize the challenges faced in skyrmion research and provide future perspectives.

关键词： magnetic skyrmions spintronics magnetic memory

magnetic skyrmions:Basic properties and potential applications

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Interdisciplinary Materials 2023年第2期2卷 260-289页

作者： Sheng Li Xuewen Wang Theo Rasing State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhanPeople's Republic of China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory FoshanPeople's Republic of China Institute for Molecules and Materials Radboud UniversityNijmegenThe Netherlands

magnetic skyrmions are particle-like topological magnetic textures that are potential information carriers in future *** enormous body of research confirms their existence in a broad range of magnetic materials since their first discovery in *** date,magnetic skyrmions can not only be found in asymmetric systems but also in centrosymmetric ***,engineered magnetic multilayers are promising structures for skyrmion-based spintronics because they can stabilize small-sized skyrmions at room temperature and facilitate their electric *** this overview,we introduce the topological nature,their special properties,and nucleation methods of skyrmions,and show their potential for *** on skyrmionic devices and developments toward other,more three-dimensional particle-like magnetic nanostructures,are discussed at the end.

关键词： antiferromagnetic skyrmions magnetic multilayers magnetic skyrmions skyrmion Hall effect spintronics ultrafast laser pulses

Generation and manipulation of skyrmions and other topological spin structures with rare metals

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Rare Metals 2022年第7期41卷 2200-2216页

作者： Chu Ye Lin-Lin Li Yun Shu Qian-Rui Li Jing Xia Zhi-Peng Hou Yan Zhou Xiao-Xi Liu Yun-You Yang Guo-Ping Zhao College of Physics and Electronic Engineering Sichuan Normal UniversityChengdu 610068China Center for Magnetism and Spintronics Sichuan Normal UniversityChengdu 610068China Guangdong Provincial Key Laboratory of Optical Information Materials and Technology Guangzhou 510006China Institute for Advanced Materials South China Normal UniversitySouth China Academy of Advanced OptoeletronicsGuangzhou 510006China School of Science and Engineering The Chinese University of Hong KongShenzhen 518172China Department of Electrical and Computer Engineering Shinshu UniversityNagano 380-8553Japan

skyrmions are nano-scale quasi-particles with topological protection,which have potential applications in next-generation spintronics-based information *** papers have been published to review various aspects of skyrmions,including physics,materials and ***,no review paper has focused on rare metals which play important roles in nucleating and manipulating skyrmions and other topological *** this paper,various roles of rare metals have been classified and summarized,which can tune Curie temperature(TC),Dzyaloshinskii-Moriya interaction(DMI),magnetocrystalline anisotropy,Ruderman-Kittel-Kasuya-Yosida(RKKY)interaction and four-spin interaction so as to trigger the generation of skyrmions and other topological spin *** materials covered include typical B20 crystals,various layered systems with interfacial DMI,frustrated materials,antiferromagnets,ferrimagnets,twodimensional(2D)materials,*** addition,the rare-earth(RE)permanent magnets can provide an energy barrier and enrich the dynamic behaviors of skyrmions,which has also been reviewed.

关键词： magnetic skyrmions Rare metals Generation and manipulation

Progress and challenges in magnetic skyrmionics

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Chinese Physics B 2022年第8期31卷 73-81页

作者：杜海峰王向荣 Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field LaboratoryHFIPSAnhuiChinese Academy of SciencesHefei 230031China Physics Department The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina

magnetic skyrmions are two-dimensional localized topological spin-structures characterized by the skyrmion number that measures the number of times of spins wrapping the Bloch sphere. skyrmions behave like particles under an external stimulus and are promising information carriers. skyrmions can exist as an isolated object as well as skyrmion condensates in crystal structures, helical/conical states, mazes or irregular stripy states with emergent electromagnetic fields. Thus,skyrmions provide a nice platform for studying fundamental physics, other than its applications in spintronics. In this perspective, we briefly review some recent progress in the field and present an outlook of the fundamental challenges in device applications.

关键词： magnetic skyrmions

Lorentz transmission electron microscopy studies on topological magnetic domains

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Chinese Physics B 2018年第6期27卷 47-61页

作者：彭丽聪张颖左淑兰何敏蔡建旺王守国魏红祥李建奇赵同云沈保根 Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China

Lorentz transmission electron microscopy（TEM） is a powerful tool to study the crystal structures and magnetic domain structures in correlation with novel physical properties. Nanometric topological magnetic configurations such as vortices, bubbles, and skyrmions have received enormous attention from the viewpoint of both fundamental science and potential applications in magnetic logic and memory devices, in which understanding the physical properties of magnetic nanodomains is essential. In this review article, several magnetic imaging methods in Lorentz TEM including the Fresnel and Foucault modes, electron holography, and differential phase contrast（DPC） techniques are discussed, where the novel properties of topological magnetic domains are well addressed. In addition, in situ Lorentz TEM demonstrates that the topological domains can be efficiently manipulated by electric currents, magnetic fields, and temperatures, exhibiting novel phenomena under external fields, which advances the development of topological nanodomain-based spintronics.

关键词： in situ Lorentz TEM magnetic vortices magnetic bubbles magnetic skyrmions

Dzyaloshinsky–Moriya interaction(DMI)-induced magnetic skyrmion materials

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Rare Metals 2021年第11期40卷 3076-3090页

作者： Wen-Sen Wei Zhi-Dong He Zhe Qu Hai-Feng Du Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field Laboratory of Chinese Academy of SciencesUniversity of Science and Technology of ChinaHefei 230031China Institutes of Physical Science and Information Technology Anhui UniversityHefei 230601China

A magnetic skyrmion is a particle-like spin swirling object with a nontrivial topology that holds great promise for next-generation information carriers in highperformance spintronic *** was discovered in a chiral magnet,MnSi with B20 structure,in 2009 and later confirmed as a common feature of magnetic compounds with Dzyaloshinsky-Moriya interaction(DMI).In this work,we provide fundamental insight into the magnetic properties of skyrmion-hosting materials originating from *** relationship between the point groups of the materials and DMI is introduced;then,the common features of magnetic skyrmions experimentally verified in the magnetization and magnetotransport measurements are ***,other particle-like magnetic configurations in chiral magnets and the crossover with a superconductor are discussed.

关键词： magnetic skyrmions Skyrmion materials Dzyaloshinsky–Moriya interaction