Abstract
Magnetic properties of the substitution series were investigated to determine the evolution from the anisotropic Kitaev magnet with magnetic ions to the isotropic Heisenberg magnet with magnetic 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 in favor of a spin-glass state of for a low doping of . The corresponding freezing temperature as a function of Cr content shows a broad maximum around .
3 More- Received 1 March 2019
DOI:https://doi.org/10.1103/PhysRevB.99.214410
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Published by the American Physical Society