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


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.

SUBMITTER: Gao N 

PROVIDER: S-EPMC6898613 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature

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

Gao N N   Je S -G S-   Im M -Y M-   Choi J W JW   Yang M M   Li Q Q   Wang T Y TY   Lee S S   Han H -S H-   Lee K -S K-   Chao W W   Hwang C C   Li J J   Qiu Z Q ZQ  

Nature communications 20191206 1


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<sub>8</sub>Zn<sub>9</sub>Mn<sub>3</sub> 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  ...[more]

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