Spin-glass state and reversed magnetic anisotropy induced by Cr doping in the Kitaev magnet α-RuCl3

Magnetic properties of the substitution series Ru1-xCrxCl3 were investigated to determine the evolution from the anisotropic Kitaev magnet α-RuCl3 with Jeff=1/2 magnetic Ru3+ ions to the isotropic Heisenberg magnet CrCl3 with S=3/2 magnetic Cr3+ 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 α-RuCl3 in favor of a spin-glass state of Ru1-xCrxCl3 for a low doping of x≤0.1. The corresponding freezing temperature as a function of Cr content shows a broad maximum around x ≤ 0.45.

Keywords

Binary alloys, Chlorine compounds, Chromium, Doping (additives), Glass, Magnetic anisotropy, Magnetic susceptibility, Magnetization reversal, Magnets, Single crystals, Specific heat, Spin glass, Thermal variables measurement, Ac susceptibility, Cr content, Cr-doping, Freezing temperatures, Isotropic Heisenberg, Long range magnetic order, Magnetization measurements, Spin glass state, Sulfur compounds

URI

https://doi.org/10.34657/3633
https://oa.tib.eu/renate/handle/123456789/5004

Citation

Bastien, G., Roslova, M., Haghighi, M. H., Mehlawat, K., Hunger, J., Isaeva, A., et al. (2019). Spin-glass state and reversed magnetic anisotropy induced by Cr doping in the Kitaev magnet α-RuCl3. 99(21). https://doi.org//10.1103/PhysRevB.99.214410

Collections

Physik

License

CC BY 4.0 Unported

https://creativecommons.org/licenses/by/4.0/

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