Magnetization "Steps" on a Kagome Lattice in Volborthite

Abstract

Magnetic properties of the spin-1/2 kagome-like compound volborthite are studied using a high-quality polycrystalline sample. It is evidenced from magnetization and specific heat measurements that the spins on the kagome lattice still fluctuate at low temperature, down to T = 60 mK that corresponds to 1/1500 of the nearest-neighbor antiferromagnetic interaction, exhibiting neither a conventional long-range order nor a spin gap. In contrast, 51V NMR experiments revealed a sharp peak at 1 K in relaxation rate, which indicates that a certain exotic order occurs. Surprisingly, we have observed three "steps" in magnetization as a function of magnetic field, suggesting that at least four liquid-like or other quantum states exist under magnetic fields.

J. Phys. Soc. Jpn, Vol.78, No.4 (2009), in press

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Cited by in corpus (36)

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• Magnetic properties and heat capacity of the three-dimensional frustrated S=1/2 antiferromagnet PbCuTe2O6
• Quantum Magnetism in Minerals
• Plaquette valence-bond ordering in J_1-J_2 Heisenberg antiferromagnet on the honeycomb lattice
• Magnetization Plateaus in the Spin-1/2 Kagome Antiferromagnets: Volborthite and Vesignieite
• Magnetic behavior of volborthite Cu3V2O7(OH)2(H2O)2 determined by coupled trimers rather than frustrated chains
• Magnetization Process of Kagome-Lattice Heisenberg Antiferromagnet
• Magnetic Order in the Spin-1/2 Kagome Antiferromagnet Vesignieite
• Coupled frustrated quantum spin-1/2 chains with orbital order in volborthite Cu3V2O7(OH)2(H2O)2
• Anomalous Behavior of the Magnetization Process of the S = 1/2 Kagome-Lattice Heisenberg Antiferromagnet at One-Third Height of the Saturation
• Magnetization Jump in the Magnetization Process of the spin-1/2 Heisenberg Antiferromagnet on a Distorted Square-Kagome Lattice
• Magnetization Process of the Spin-S Kagome-Lattice Heisenberg Antiferromagnet
• Spin dynamics in the high-field phases of volborthite
• Pair Correlations, Short Range Order and Dispersive Excitations in the Quasi-Kagome Quantum Magnet Volborthite
• High-Field ESR Measurements of S=1/2 Kagome Lattice Antiferromagnet BaCu${}_3$V${}_2$O${}_8$(OH)${}_2$
• Stability of the spin-$1/2$ kagome ground state with breathing anisotropy
• Phase transitions and thermodynamics of the two-dimensional Ising model on a distorted Kagomé lattice
• Z2-vortex order of frustrated Heisenberg antiferromagnets in two dimensions
• High-field Phase Diagram and Spin Structure of Volborthite Cu3V2O7(OH)2/2H2O
• Magnetization and Lyapunov exponents on a kagome chain with multi-site exchange interaction
• S=1/2 quantum critical spin ladders produced by orbital ordering in Ba2CuTeO6
• Heterogeneous spin state in the field-induced phase of volborthite as seen via 51V nuclear magnetic resonance
• Magnetic Properties of the Spin-1/2 Deformed Kagome Antiferromagnet Edwardsite
• Spin-$\frac{1}{2}$ kagome Heisenberg antiferromagnet with strong breathing anisotropy
• Ghost modes and continuum scattering in the dimerized distorted kagome lattice antiferromagnet Rb${}_2$Cu${}_3$SnF${}_{12}$
• Distorted Kagome Lattice Generated by a Unique Orbital Arrangement in the Copper Mineral KCu3As2O7(OH)3
• Fermionic spin liquid analysis of the paramagnetic state in Volborthite
• Short-range order and hidden energy scale in geometrically frustrated magnets
• Tuning the spin dynamics of kagome systems
• Quantum spin liquid and magnetic order in a two-dimensional non-symmorphic lattice: considering the distorted Kagome lattice of Volborthite
• Quantum transport observed in films of magnetic topological semimetal EuSb${}_2$
• Magnetization Step in Spatially Distorted Heisenberg Kagome Antiferromagnets
• Effects of Dzyaloshinskii-Moriya interactions in volborthite: Magnetic orders and thermal Hall effect
• Gapless Spin Excitations in the $S=1/2$ Kagome- and Triangular-Lattice Heisenberg Antiferromagnets