1State Key Laboratory of Information Photonicsx and Optical Communications, and School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China 2Department of Physics, and Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices, Renmin University of China, Beijing 100872, China
Abstract：We study the influence of Cr doping on magnetic properties of $\alpha$-RuCl$_{3}$ single crystals in detail. With increasing Cr content, the $c$-axial lattice parameter increases gradually, implying that the Cr doping may weaken the interlayer interactions. The magnetism of Ru$_{1-x}$Cr$_{x}$Cl$_{3}$ single crystals evolves from a long-range AFM order to a possible spin-glass state with Cr doping. The appearance of a possible spin-glass state can be explained by the introduction of FM interaction by Cr$^{3+}$ ions, which competes with the AFM interaction between Ru$^{3+}$ ions. Moreover, the larger magnetic moment of Cr$^{3+}$ ion with $S= 3/2$ than Ru$^{3+}$ ion with $J_{\rm eff}= 1/2$ also results in a monotonic increase of the effective moment of Ru$_{1-x}$Cr$_{x}$Cl$_{3}$ single crystal.
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2020, Vol. 37 
