Dilution of the magnetic lattice in the Kitaev candidate α−RuCl3 by Rh3+ doping

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung



Magnetic dilution of a well-established Kitaev candidate system is realized in the substitutional Ru$_{1-x}$Rh$_x$Cl$_3$ series ($x = 0.02-0.6$). Optimized syntheses protocols yield uniformly-doped single crystals and polycrystalline powders that are isostructural to the parental $\alpha$-RuCl$_3$ 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 Ru$_{1-x}$Rh$_x$Cl$_3$ 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 $x \approx 0.2$ 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 Ru$_{1-x}$Ir$_x$Cl$_3$, we propose that chemical pressure would contribute to the suppression of magnetic order especially in Ru$_{1-x}$Ir$_x$Cl$_3$ and that the zigzag magnetic ground state appears to be relatively robust with respect to the dilution of the Kitaev--$\Gamma$--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.


FachzeitschriftPhysical review materials
PublikationsstatusVeröffentlicht - 16 Nov. 2022

Externe IDs

unpaywall 10.1103/physrevmaterials.6.114403
Mendeley 9053ba0f-9d9d-368f-a085-9ef99240d3e5
Scopus 85143665688
WOS 000893260400001


DFG-Fachsystematik nach Fachkollegium

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  • Spin, Liquid