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

Title
Creation and annihilation of topological meron pairs in in-plane magnetized films
Authors
Gao, NingboJe, SchergerIm, Mi‐YoungChoi, Jun WooYang, MashengLi, Qin-ciWang T.Y.Lee, Suk WooHan, HexiangLee, Ki-SukChao, WeiweiHwang, ChangyongLi J.Qiu Z.Q.
Issue Date
2019-12
Citation
Nature Communications, 10(1)
Type
Article
Article Type
Article
Keywords
MICROSCOPYDYNAMICSSKYRMION LATTICEROOM-TEMPERATURESTATESCORE
ISSN
2041-1723
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. © 2019, The Author(s).
URI
http://hdl.handle.net/20.500.11750/11389
DOI
10.1038/s41467-019-13642-z
Publisher
Nature Research
Files:
Collection:
ETC1. Journal Articles


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