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Creation and annihilation of topological meron pairs in in-plane magnetized films

Author

Listed:
  • N. Gao

    (Institute of Microelectronics of Chinese Academy of Sciences
    University of California at Berkeley)

  • S. -G. Je

    (Lawrence Berkeley National Laboratory)

  • M. -Y. Im

    (Lawrence Berkeley National Laboratory
    Department of Emerging Materials Science, DGIST)

  • J. W. Choi

    (Korea Institute of Science and Technology)

  • M. Yang

    (University of California at Berkeley)

  • Q. Li

    (University of California at Berkeley)

  • T. Y. Wang

    (University of California at Berkeley)

  • S. Lee

    (Ulsan National Institute of Science and Technology)

  • H. -S. Han

    (Ulsan National Institute of Science and Technology)

  • K. -S. Lee

    (Ulsan National Institute of Science and Technology)

  • W. Chao

    (Lawrence Berkeley National Laboratory)

  • C. Hwang

    (Korea Research Institute of Standards and Science, Yuseong)

  • J. Li

    (Peking University)

  • Z. Q. Qiu

    (University of California at Berkeley)

Abstract

Merons which are topologically equivalent to one-half of skyrmions can exist only in pairs or groups in two-dimensional (2D) ferromagnetic (FM) systems. The recent discovery of meron lattice in chiral magnet Co8Zn9Mn3 raises the immediate challenging question that whether a single meron pair, which is the most fundamental topological structure in any 2D meron systems, can be created and stabilized in a continuous FM film? Utilizing winding number conservation, we develop a new method to create and stabilize a single pair of merons in a continuous Py film by local vortex imprinting from a Co disk. By observing the created meron pair directly within a magnetic field, we determine its topological structure unambiguously and explore the topological effect in its creation and annihilation processes. Our work opens a pathway towards developing and controlling topological structures in general magnetic systems without the restriction of perpendicular anisotropy and Dzyaloshinskii–Moriya interaction.

Suggested Citation

  • N. Gao & S. -G. Je & M. -Y. Im & J. W. Choi & M. Yang & Q. Li & T. Y. Wang & S. Lee & H. -S. Han & K. -S. Lee & W. Chao & C. Hwang & J. Li & Z. Q. Qiu, 2019. "Creation and annihilation of topological meron pairs in in-plane magnetized films," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-13642-z
    DOI: 10.1038/s41467-019-13642-z
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    Cited by:

    1. Jagannath Jena & Börge Göbel & Tomoki Hirosawa & Sebastián A. Díaz & Daniel Wolf & Taichi Hinokihara & Vivek Kumar & Ingrid Mertig & Claudia Felser & Axel Lubk & Daniel Loss & Stuart S. P. Parkin, 2022. "Observation of fractional spin textures in a Heusler material," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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