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Creation and annihilation of topological meron pairs in in-plane magnetized films
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Creation and annihilation of topological meron pairs in in-plane magnetized films
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Creation and annihilation of topological meron pairs in in-plane magnetized films
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Journal Article
Creation and annihilation of topological meron pairs in in-plane magnetized films
2019
Overview
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 Co
8
Zn
9
Mn
3
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.
A meron is one half of a skyrmion but whether a single meron pair can be created and stabilized remains a challenging question. Here, Gao et al. develop a method to create and stabilize individual pairs of merons in a continuous Py film by local vortex imprinting from Co disks.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
