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Fujishiro, Y; Kanazawa, N; Nakajima, T; Yu, X Z; Ohishi, K; Kawamura, Y; Kakurai, K; Arima, T; Mitamura, H; Miyake, A; Akiba, K; Tokunaga, M; Matsuo, A; Kindo, K; Koretsune, T; Arita, R; Tokura, Y
Nature communications, 03/2019, Letnik: 10, Številka: 1Journal Article
Manipulating topological spin textures is a key for exploring unprecedented emergent electromagnetic phenomena. Whereas switching control of magnetic skyrmions, e.g., the transitions between a skyrmion-lattice phase and conventional magnetic orders, is intensively studied towards development of future memory device concepts, transitions among spin textures with different topological orders remain largely unexplored. Here we develop a series of chiral magnets MnSi Ge , serving as a platform for transitions among skyrmion- and hedgehog-lattice states. By neutron scattering, Lorentz transmission electron microscopy and high-field transport measurements, we observe three different topological spin textures with variation of the lattice constant controlled by Si/Ge substitution: two-dimensional skyrmion lattice in x = 0-0.25 and two distinct three-dimensional hedgehog lattices in x = 0.3-0.6 and x = 0.7-1. The emergence of various topological spin states in the chemical-pressure-controlled materials suggests a new route for direct manipulation of the spin-texture topology by facile mechanical methods.
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