Spin-glass state and reversed magnetic anisotropy induced by Cr doping in the Kitaev magnet $\alpha$-RuCl${}_3$

Abstract

Magnetic properties of the substitution series Ru${}_{1-x}$Cr${}_x$Cl${}_3$ were investigated to determine the evolution from the anisotropic Kitaev magnet $\alpha$-RuCl${}_3$ with $J_{\mathrm{eff}}=1/2$ magnetic Ru${}^{3+}$ ions to the isotropic Heisenberg magnet CrCl${}_3$ with $S=3/2$ magnetic Cr${}^{3+}$ ions. Magnetization measurements on single crystals revealed a reversal of the magnetic anisotropy under doping, which we argue to arise from the competition between anisotropic Kitaev and off-diagonal interactions on the Ru-Ru links and approximately isotropic Cr-Ru and isotropic Cr-Cr interactions. In addition, combined magnetization, ac susceptibility and specific-heat measurements clearly show the destabilization of the long-range magnetic order of $\alpha$-RuCl${}_3$ in favor of a spin-glass state of Ru${}_{1-x}$Cr${}_x$Cl${}_3$ for a low doping of $x\backsimeq 0.1$. The corresponding freezing temperature as a function of Cr content shows a broad maximum around $x\backsimeq 0.45$.

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Cited by in corpus (20)

• Spin Dynamics in van der Waals Magnetic Systems
• Magnetoelastic coupling and effects of uniaxial strain in $\alpha$-RuCl${}_3$ from first principles
• Electron spin resonance and ferromagnetic resonance spectroscopy in the high-field phase of the van der Waals magnet CrCl${}_3$
• Spin dynamics in the Kitaev model with disorder: Quantum Monte Carlo study of dynamical spin structure factor, magnetic susceptibility, and NMR relaxation rate
• Further insights into the thermodynamics of the Kitaev honeycomb model
• Self-selecting vapor growth of transition metal halide single crystals
• Detuning the Honeycomb of the α-RuCl3 Kitaev lattice: A case of Cr3+ dopant
• Comparing the influence of Floquet dynamics in various Kitaev-Heisenberg materials
• Electron Spin Resonance Spectroscopy on Magnetic Van der Waals Compounds
• Role of stacking defects on the magnetic behavior of CrCl${}_3$
• Dimer Crystallization Induced by Elemental Substitution in the Honeycomb Lattice of Ru1-xOsxCl3
• From linear to circular polarized light -- Floquet engineering in Kitaev-Heisenberg materials with Lissajous figures
• Chemical tuning of a honeycomb magnet through a critical point
• Dilution of the magnetic lattice in the Kitaev candidate $\alpha$-RuCl${}_3$ by Rh${}^{3+}$ doping
• Role of Frustration in a Weakly Disordered Checkerboard Lattice
• Signatures of a gapless quantum spin liquid in the Kitaev material Na${}_3$Co${}_{2-x}$Zn${}_x$SbO${}_6$
• The nature of low-temperature spin-freezing in frustrated Kitaev magnets
• Ligand Field Exciton Annihilation in Bulk CrCl3
• Topological Majorana flat bands in the Kitaev model on a Bishamon-kikko lattice
• Spin disorder state induced by Mg${}^{2+}$ doping in a Kitaev material Na${}_3$Co${}_2$SbO${}_6$