K. Karube

TL;DR: In this paper, a room-temperature metastable skyrmion phase was found in β-Mn-type Co8Zn8Mn4, which undergoes reversible transitions between a triangular and square lattice upon varying the temperature and magnetic field.

TL;DR: The intermediate composition system Co7Zn7Mn6 is reported to be a unique host of two disconnected, thermal-equilibrium topological skyrmion phases; one is a conventional skyrnion crystal phase stabilized by thermal fluctuations and restricted to exist just below the magnetic transition temperature Tc, and the other is a novel three-dimensionally disordered skyrMion phase that is stable well below Tc.

TL;DR: It is described that for a room-temperature skyrmion material, β-Mn-type Co 8Zn 8Mn 4, a field-cooling via the equilibrium SkX state can suppress the transition to the helical or conical state, instead realizing robust metastable SkX states that survive over a very wide temperature and magnetic-field region.

TL;DR: For a high-temperature chiral magnet with bulk Dzyaloshinskii-Moriya interaction, skyrmions persist over almost the whole temperature region below 400 K as a long-lived metastable state reached by moderately slow field cooling as discussed by the authors.

TL;DR: The deformation of the skyrmions in the supercooled metastable phase is observed irrespective of the crystallographic orientation of the thin plate, whereas the elongation direction nearly aligns along the magnetic easy axis.