Topological transitions among skyrmion- and hedgehog-lattice states in cubic chiral magnets
説明
<jats:title>Abstract</jats:title><jats:p>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<jats:sub>1−<jats:italic>x</jats:italic></jats:sub>Ge<jats:sub><jats:italic>x</jats:italic></jats:sub>, 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 <jats:italic>x</jats:italic> = 0–0.25 and two distinct three-dimensional hedgehog lattices in <jats:italic>x</jats:italic> = 0.3–0.6 and <jats:italic>x</jats:italic> = 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.</jats:p>
収録刊行物
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- Nature Communications
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Nature Communications 10 (1), 1059-, 2019-03-05
Springer Science and Business Media LLC