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
최준우N. GaoS.-G. JeM.-Y. ImM. YangQ. LiT.Y. WangS. LeeH.-S. HanK.-S. LeeW. ChaoC. HwangJ. LiZ.Q. Qiu
Keywords
topological spin structures
Issue Date
2019-12
Publisher
Nature Communications
Citation
VOL 10, 5603
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.
URI
http://pubs.kist.re.kr/handle/201004/71131
ISSN
2041-1723
Appears in Collections:
KIST Publication > Article
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