Field-orientation-dependent magnetic phases in GdRu${}_2$Si${}_2$ probed with muon-spin spectroscopy

Abstract

Centrosymmetric GdRu${}_2$Si${}_2$ exhibits a variety of multi-Q magnetic states as a function of temperature and applied magnetic field, including a square skyrmion-lattice phase. The material's behavior is strongly dependent on the direction of the applied field, with different phase diagrams resulting for fields applied parallel or perpendicular to the crystallographic $c$ axis. Here, we present the results of muon-spin relaxation (${\mu }^{+}$SR) measurements on single crystals of GdRu${}_2$Si${}_2$. Our analysis is based on the computation of muon stopping sites and consideration of zero-point motion effects, allowing direct comparison with the underlying spin textures in the material. The muon site is confirmed experimentally, using angle-dependent measurements of the muon Knight shift. Using transverse-field ${\mu }^{+}$SR with fields applied along either the [001] or [100] crystallographic directions, we distinguish between the magnetic phases in this system via their distinct muon response, providing additional evidence for the skyrmion and meron-lattice phases, while also suggesting the existence of RKKY-driven muon hyperfine coupling. Zero-field ${\mu }^{+}$SR provides clear evidence for a transition between two distinct magnetically-ordered phases at 39 K.

19 pages, 9 figures

References in corpus (15)

• Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
• Nanometric square skyrmion lattice in a centrosymmetric tetragonal magnet
• Imaging the coupling between itinerant electrons and localised moments in the centrosymmetric skyrmion magnet GdRu2Si2
• Zoology of multiple-Q spin textures in a centrosymmetric tetragonal magnet with itinerant electrons
• The Double-$Q$ Ground State with Topological Charge Stripes in the Skyrmion Candidate ${\text{GdRu}}_{\text{2}}{\text{Si}}_{\text{2}}$
• Understanding the $\mu$SR spectra of MnSi without magnetic polarons
• Fermi-surface origin of skyrmion lattices in centrosymmetric rare-earth intermetallics
• Skyrmions in magnetic materials
• DFT+μ: Density Functional Theory for Muon Site Determination
• MuFinder: A program to determine and analyse muon stopping sites
• Transverse field muon-spin rotation signature of the skyrmion lattice phase in Cu2OSeO3
• Megahertz dynamics in skyrmion systems probed with muon-spin relaxation
• Anisotropic skyrmion and multi-$q$ spin dynamics in centrosymmetric Gd${}_2$PdSi${}_3$
• Many-Body Quantum Muon Effects and Quadrupolar Coupling in Solids
• A numerical method to calculate the muon relaxation function in the presence of diffusion

Cited by in corpus (2)

• A Magnon Band Analysis of GdRu2Si2 in the Field-Polarized State
• Magnetism in $M_{1/3}$NbS${}_2$ ($M$ = Fe, V, Mn): insight into intercalated transition-metal dichalcogenides using $\mu$SR