Ground State and Intrinsic Susceptibility of the Kagome Antiferromagnet Vesignieite as seen by 51V NMR

Abstract

The intrinsic magnetic susceptibility and local magnetization of the near-kagome quantum magnet vesignieite, Cu3BaV2O8(OH)2, are presented as measured using 51V NMR. The NMR line shift gives an accurate measurement of the intrinsic susceptibility of the kagome sites which closely resembles that of the quantum spin liquid herbertsmithite [A. Olariu et al. Phys. Rev. Lett. 100, 087202 (2008)]. It is therefore surprising that, at Tc ~ 9 K, a transition to a heterogeneous ground state is observed. A gradual wipeout of half the NMR intensity indicates a slowly fluctuating spin liquid component and a detailed analysis of the linewidth reveals the onset of static magnetism at the remaining half of the sites. It is proposed that this transition and unusual ground state originate from a nearby quantum critical point induced by the Dzyaloshinskii-Moriya interaction.

5 pages, 4 figures

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• Multiferroicity in spin ice: towards a magnetic crystallography of Tb2Ti2O7 in a field
• From spin liquid to magnetic ordering in the anisotropic kagome Y-Kapellasite Y3Cu9(OH)19Cl8: a single crystal study
• Topological Magnetic Excitations on the Distorted Kagome Antiferromagnets: Applications to Volborthite, Vesignieite, and Edwardsite
• Absence of magnetic long range order in Ba${}_3$ZnRu${}_2$O${}_9$: A spin-liquid candidate in the $S=3/2$ dimer lattice
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• Magnetic Properties of the Spin-1/2 Deformed Kagome Antiferromagnet Edwardsite
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• Inhomogeneous magnetism in the doped kagome lattice of LaCuO2.66
• Tuning the spin dynamics of kagome systems
• Spontaneous magnetization of Kagome lattice in Ising model
• The nature of low-temperature spin-freezing in frustrated Kitaev magnets
• Collapse of susceptibility and non-trivial spin dynamics in the hyper-honeycomb magnet $\beta$-Li${}_2$IrO${}_3$ under high pressure