Modified Curie-Weiss Law for $j_{\mathrm{eff}}$ Magnets

Abstract

In spin-orbit-coupled magnetic materials, the usually applied Curie-Weiss law can break down. This is due to potentially sharp temperature-dependence of the local magnetic moments. We therefore propose a modified Curie-Weiss formula suitable for analysis of experimental susceptibility. We show for octahedrally coordinated materials of $d^5$ filling that the Weiss constant obtained from the improved formula is in excellent agreement with the calculated Weiss constant from microscopic exchange interactions. Reanalyzing the measured susceptibility of several Kitaev candidate materials with the modified formula resolves apparent discrepancies between various experiments regarding the magnitude and anisotropies of the underlying magnetic couplings.

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Cited by in corpus (13)

• Magnetism of Kitaev spin-liquid candidate material RuBr${}_3$
• Electronic and magnetic properties of the RuX${}_3$ (X=Cl, Br, I) family: Two siblings -- and a cousin?
• Kitaev magnetism through the prism of lithium iridate
• Nearly itinerant electronic groundstate in the intercalated honeycomb iridate Ag${}_3$LiIr${}_2$O${}_6$
• Curie-law crossover in spin liquids
• Anomalous continuum scattering and higher-order van Hove singularity in the strongly anisotropic S = 1/2 triangular lattice antiferromagnet
• Magnetic Excitations and Interactions in the Kitaev Hyperhoneycomb Iridate $\beta$-Li${}_2$IrO${}_3$
• Kitaev Interactions Through an Extended Superexchange Pathway in the jeff = 1/2 Ru3+ Honeycomb Magnet, RuP3SiO11
• Role of disorder in the electronic and magnetic properties of Ag${}_3$LiIr${}_2$O${}_6$
• Cobalt-Based Pyroxenes: A New Playground for Kitaev Physics and Ising Model Realization
• Kondo-like behavior in a mixed valent oxypnictide $\mathrm{L}{\mathrm{a}}_3\mathrm{C}{\mathrm{u}}_4{\mathrm{P}}_4{\mathrm{O}}_2$
• Pressure-dependent magnetism of the Kitaev candidate Li${}_2$RhO${}_3$
• Doping dependence of the magnetic ground state in the frustrated magnets Ba${}_2$$M$Te${}_{1-x}$W${}_x$O${}_6$ ($M$ = Mn, Co)