Dilution of the magnetic lattice in the Kitaev candidate αRuCl3 by Rh3+ doping

Gaël Bastien, Ekaterina Vinokurova, Moritz Lange, Kranthi Kumar Bestha, Laura T. Corredor Bohorquez, Gesine Kreutzer, Axel Lubk, Thomas Doert, Bernd Büchner, Anna Isaeva, and Anja U. B. Wolter
Phys. Rev. Materials 6, 114403 – Published 16 November 2022
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Abstract

Magnetic dilution of a well-established Kitaev candidate system is realized in the substitutional Ru1xRhxCl3 series (x=0.020.6). Optimized syntheses protocols yield uniformly doped single crystals and polycrystalline powders that are isostructural to the parental αRuCl3 as per x-ray diffraction. The Rh content x is accurately determined by the quantitative energy-dispersive x-ray spectroscopy technique with standards. We determine the magnetic phase diagram of Ru1xRhxCl3 for in-plane magnetic fields from magnetization and specific-heat measurements as a function of x and stacking periodicity and identify the suppression of the magnetic order at x0.2 towards a disordered phase, which does not show any clear signature of freezing into a spin glass. Comparing with previous studies on the substitution series Ru1xIrxCl3, we propose that chemical pressure would contribute to the suppression of magnetic order, especially in Ru1xIrxCl3, and that the zigzag magnetic ground state appears to be relatively robust with respect to the dilution of the Kitaev-Γ-Heisenberg magnetic lattice. We also discovered a slight dependence of the magnetic properties on thermal cycling, which would be due to an incomplete structural transition.

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  • Received 3 July 2022
  • Accepted 10 October 2022

DOI:https://doi.org/10.1103/PhysRevMaterials.6.114403

©2022 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Gaël Bastien1,2,*, Ekaterina Vinokurova1,3, Moritz Lange1, Kranthi Kumar Bestha1, Laura T. Corredor Bohorquez1, Gesine Kreutzer1, Axel Lubk1,4, Thomas Doert5, Bernd Büchner1,4, Anna Isaeva1,6,†, and Anja U. B. Wolter1

  • 1Leibniz IFW Dresden, Institute of Solid State Research, 01069 Dresden, Germany
  • 2Charles University, Faculty of Mathematics and Physics, Department of Condensed Matter Physics, Prague, Czech Republic
  • 3Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany
  • 4Institut für Festkörper- und Materialphysik and Würzburg-Dresden Cluster of Excellence ct.qmat, Technische Universität Dresden, 01062 Dresden, Germany
  • 5Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062 Dresden, Germany
  • 6Van der Waals-Zeeman Institute, Department of Physics and Astronomy, University of Amsterdam, Science Park 094, 1098 XH Amsterdam, The Netherlands

  • *gael.bastien@mag.mff.cuni.cz
  • a.isaeva@uva.nl

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Issue

Vol. 6, Iss. 11 — November 2022

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