Direct observation of cycloidal spin modulation and field-induced transition in Néel-type skyrmion-hosting VOSe${}_2$O${}_5$

Abstract

We investigate the spin rotational structure of magnetic skyrmions in a tetragonal polar magnet VOSe2O5 via polarized small-angle neutron scattering (SANS). Spin polarization analysis of the scattered neutrons provides consistent evidence for the cycloidal spin modulation in all the incommensurate phases at zero and non-zero magnetic field along the c axis, including the triangular skyrmion-lattice phase. In the vicinity of the skyrmion phase, we performed extensive SANS measurements to unravel a field-induced incommensurate phase (IC-2 state). We discuss the possibility of anisotropic double-q state as an alternative spin structure to provisional square skyrmion-lattice state.

arXiv comment27 pages, 5 figures

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Cited by in corpus (6)

• Meron, skyrmion, and vortex crystals in centrosymmetric tetragonal magnets
• Distorted triangular skyrmion lattice in a noncentrosymmetric tetragonal magnet
• Fundamental Theory of Current-Induced Motion of Magnetic Skyrmions
• Observation by SANS and PNR of pure Néel-type domain wall profiles and skyrmion suppression below room temperature in magnetic [Pt/CoFeB/Ru]${}_{10}$ multilayers
• Theory of magnetic vortex crystals induced by electric dipole interactions
• Meron-antimeron crystals in noncentrosymmetric itinerant magnets on a triangular lattice