Resonant Elastic X-ray Scattering from the Skyrmion Lattice in Cu${}_2$OSeO${}_3$

Abstract

We report the study of the skyrmion state near the surface of Cu${}_2$OSeO${}_3$ using soft resonant elastic x-ray scattering (REXS) at the Cu $L_3$ edge. Within the lateral sampling area of $200\times 200$ $\mu$m${}^2$, we found a long-range-ordered skyrmion lattice phase as well as the formation of skyrmion domains via the multiple splitting of the diffraction spots. In a recent REXS study of the skyrmion phase of Cu${}_2$OSeO${}_3$ [Phys. Rev. Lett. 112, 167202 (2014)], Langner et al. reported the observation of the unexpected existence of two distinct skyrmion sublattices that arise from inequivalent Cu sites, and that the rotation and superposition of the two periodic structures leads to a moiré pattern. However, we find no energy splitting of the Cu peak in x-ray absorption measurements and, instead, discuss alternative origins of the peak splitting. In particular, we find that for magnetic field directions deviating from the major cubic axes, a multidomain skyrmion lattice state is obtained, which consistently explains the splitting of the magnetic spots into two - and more - peaks.

arXiv comment6 pages, 3 figures

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Cited by in corpus (17)

• Magnetic skyrmions and skyrmion clusters in the helical phase of Cu${}_2$OSeO${}_3$
• Dynamical defects in rotating magnetic skyrmion lattices
• Thermodynamic evidence of a second skyrmion lattice phase and tilted conical phase in Cu${}_2$0SeO${}_3$
• Creation of a Chiral Bobber Lattice in Helimagnet-Multilayer Heterostructures
• Reorientations, relaxations, metastabilities and multidomains of skyrmion lattices
• Response of the skyrmion lattice in MnSi to cubic magnetocrystalline anisotropies
• Resonant x-ray diffraction from chiral electric-polarization structures
• Ferromagnetic resonance with magnetic phase selectivity by means of resonant elastic x-ray scattering on a chiral magnet
• Imaging and manipulation of skyrmion lattice domains in Cu2OSeO3
• Structure-selective operando x-ray spectroscopy
• Chiral surface spin textures in Cu${}_2$OSeO${}_3$ unveiled by soft x-ray scattering in specular reflection geometry
• X-ray detected ferromagnetic resonance techniques for the study of magnetization dynamics
• Resonant elastic X-ray scattering of antiferromagnetic superstructures in EuPtSi${}_3$
• Site-specific electronic and magnetic excitations of the skyrmion material Cu${}_2$OSeO${}_3$
• Time-resolved measurement of spin excitations in Cu${}_2$OSeO${}_3$
• Effect of chemical substitution on the skyrmion phase in Cu${}_2$OSeO${}_3$
• Observation of distorted tilted conical phase at the surface of a bulk chiral magnet with resonant elastic x-ray scattering