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Topologically Non-trivial Magnetic Skyrmions in Confined Geometries

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The Role of Topology in Materials

Part of the book series: Springer Series in Solid-State Sciences ((SSSOL,volume 189))

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Abstract

Magnetic skyrmion is a small magnetic whirl that possesses non-trivial topology and behaves like a particle. The specially twisted spin arrangement within skyrmion gives rise to topological stability and low critical current to drive its motion, both of them benefit the potential technological application in memory devices. In this chapter, we briefly introduce the notation of topology of magnetic skyrmions and recent progress ranging from the hard disk storage in conventional magnetic memory device to racetrack memory by using magnetic skyrmions. The related magnetic phases in skyrmion materials based on the Dzyaloshinskii-Moriya (DM) interactions are discussed in detail. Furthermore, experimental achievements for the formation and stability of highly geometry-confined skyrmions are outlined, where the topological effects are fully embodied.

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Acknowledgements

This work was supported by the National Key R&D Program of China, Grant No. 2017YFA0303201; the Key Research Program of the Chinese Academy of Science, KJZD-SW-M01; the Natural Science Foundation of China, Grant No. 51622105, 11474290; the Key Research Program of Frontier Sciences, CAS, Grant No. QYZDB-SSW-SLH009; the Youth Innovation Promotion Association CAS No. 2015267; the Major/Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology Grant No. 2016FXCX001.

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Authors and Affiliations

  1. The Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, and High Magnetic Field Laboratory, Chinese Academy of Science (CAS), Hefei, 230031, Anhui, China

    Haifeng Du & Mingliang Tian

  2. School of Physics and Materials Science, Anhui University, Hefei, 230601, Anhui, China

    Haifeng Du & Mingliang Tian

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  1. Haifeng Du
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  2. Mingliang Tian
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Correspondence to Mingliang Tian .

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Editors and Affiliations

  1. Department of Physics and Astronomy, Western Kentucky University, Bowling Green, Kentucky, USA

    Sanju Gupta

  2. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA

    Avadh Saxena

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Du, H., Tian, M. (2018). Topologically Non-trivial Magnetic Skyrmions in Confined Geometries. In: Gupta, S., Saxena, A. (eds) The Role of Topology in Materials. Springer Series in Solid-State Sciences, vol 189. Springer, Cham. https://doi.org/10.1007/978-3-319-76596-9_5

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