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磁斯格明子是一种具有准粒子特性的拓扑纳米磁畴壁结构.由于磁斯格明子具有较好的稳定性和新奇的动力学特性,并可被磁场、电场、电流等方式调控,有望成为高密度、低耗能、非易失性信息存储及逻辑运算的新兴信息载体.自2009年磁斯格明子首次被实验观测到至今,已有多种基于磁斯格明子的器件概念和原型器件被提出.本文对基于磁斯格明子应用的研究进展进行综述,对现阶段几种具有代表性的磁斯格明子器件应用进行简要介绍、分析和总结,包括基于磁斯格明子的赛道存储器件、逻辑计算器件、类晶体管功能器件和纳米级微波振荡器;同时阐述了几种可能的通过磁斯格明子表达二进制信息元的方法;并展望了磁斯格明子的其他潜在应用以及未来基于磁斯格明子器件应用的发展方向.Magnetic skyrmions possess topologically non-trivial particle-like nanoscale domain wall structures, which have reasonably good stability and unique dynamic properties and can be controlled by magnetic fields, electric fields, and electric currents. Therefore, magnetic skyrmions are expected to be used as novel information carriers in the next-generation high-density, low-energy-consumption, and non-volatile information storage and logic computing devices. Since the first experimental observation of magnetic skyrmions in 2009, a number of skyrmion-based device prototypes have been proposed. In this article, we review the recently proposed skyrmion-based devices and applications, including skyrmion-based racetrack memory, logic computing device, transistor-like functional device, and nano-oscillator. We first discuss advantages of skyrmion-based racetrack memory and solutions for some problems we are facing currently. We then introduce the duplication and merging of magnetic skyrmions and the skyrmion-based logic OR and AND gates. We also introduce the switch function of skyrmion-based transistor-like functional device. The switch function is realized via a voltage gate and controlled by the applied voltage as well as the driving spin current. Besides, a brief introduction of the skyrmion-based nano-oscillator is given. In addition, we introduce several possible methods to encode binary information in skyrmion-based devices. Finally, we discuss some possible future novel applications based on magnetic skyrmions.
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Keywords:
- skyrmion /
- magnetism /
- topology /
- spintronics
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[2] Yu X Z, Onose Y, Kanazawa N, Park J H, Han J H, Matsui Y, Nagaosa N, Tokura Y 2010 Nature 465 901
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[4] Romming N, Kubetzka A, Hanneken C, von Bergmann K, Wiesendanger R 2015 Phys. Rev. Lett. 114 177203
[5] Chen G, Mascaraque A, N'Diaye A T, Schmid A K 2015 Appl. Phys. Lett. 106 242404
[6] Du H, DeGrave J P, Xue F, Liang D, Ning W, Yang J, Tian M, Zhang Y, Jin S 2014 Nano Lett. 14 2026
[7] Jiang W, Upadhyaya P, Zhang W, Yu G, Jungfleisch M B, Fradin F Y, Pearson J E, Tserkovnyak Y, Wang K L, Heinonen O, te Velthuis S G E, Hoffmann A 2015 Science 349 283
[8] Jiang W, Zhang X, Yu G, Zhang W, Wang X, Benjamin Jungfleisch M, Pearson J E, Cheng X, Heinonen O, Wang K L, Zhou Y, Hoffmann A, te Velthuis S G E 2017 Nat. Phys. 13 162
[9] Woo S, Song K M, Zhang X, Zhou Y, Ezawa M, Liu X, Finizio S, Raabe J, Lee N J, Kim S I, Park S Y, Kim Y, Kim J Y, Lee D, Lee O, Choi J W, Min B C, Koo H C, Chang J 2018 Nat. Commun. 9 959
[10] Barker J, Tretiakov O A 2016 Phys. Rev. Lett. 116 147203
[11] Zhang X, Zhou Y, Ezawa M 2016 Sci. Rep. 6 24795
[12] Seki S, Yu X Z, Ishiwata S, Tokura Y 2012 Science 336 198
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[79] Huang Y, Kang W, Zhang X, Zhou Y, Zhao W 2017 Nanotechnology 28 08LT02
[80] Li S, Kang W, Huang Y, Zhang X, Zhou Y, Zhao W 2017 Nanotechnology 28 31LT01
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