NMR study of the magnetic properties of NaV6O11: spin-gap behavior of Kagomé lattice

Uchida, Yoshishige; Onoda, Yoshito; Kanke, Yasushi

doi:10.1016/s0304-8853(00)00793-9

Cited by 10 publications

(12 citation statements)

References 3 publications

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“…NaV 6 O 11 is the best studied member of this series and shows a range of interesting properties including crystallographic phase transitions and metallic weak ferromagnetism [19][20][21]. A partial form of magnetic frustration is also known, as one set of V sites (out of three) in the crystal structure forms a Kagome lattice [22]. All of the above materials involve mixedvalence V 4+ /V 3+ , both of which are common oxidation states for vanadium oxides.…”

Section: Introductionmentioning

confidence: 99%

Phase transitions and electrical transport in the mixed-valence V2+/V3+ oxide BaV10O15

Bridges

Greedan

2004

Journal of Solid State Chemistry

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Section: Introductionmentioning

confidence: 99%

Phase transitions and electrical transport in the mixed-valence V2+/V3+ oxide BaV10O15

Bridges

Greedan

2004

Journal of Solid State Chemistry

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“…While m−MPYNN · BF 4 is wellknown to be spin-gapped at low temperatures, the behavior of KV 3 Ge 2 O 9 is reported to be more exotic. Another material, NaV 6 O 11 (a metallic vanadate), has three types of vanadium ions, of which one type forms the spin-1 Kagomé layers exhibiting spin-gap behavior below 243K, accompanied by explicit trimerization [32,33]. The appearance of weak spontaneous magnetization below 65K (due to other vanadium ions), however, undermines the trimerized singlet physics of its Kagomé layers.The most recent numerical calculations using tensor network algorithms [34,35], exact diagonalization and density matrix renormalization group (DMRG) [36] find arXiv:1507.08038v2 [cond-mat.str-el]…”

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confidence: 99%

Plaquette-triplon analysis of magnetic disorder and order in a trimerized spin-1 kagome Heisenberg antiferromagnet

2016

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A spin-1 Heisenberg model on trimerized Kagomé lattice is studied by doing a low-energy bosonic theory in terms of plaquette-triplons defined on its triangular unit-cells. The model considered has an intra-triangle antiferromagnetic exchange interaction, J (set to 1), and two inter-triangle couplings, J > 0 (nearest-neighbor) and J (next-nearest-neighbor; of both signs). The triplon analysis performed on this model investigates the stability of the trimerized singlet ground state (which is exact in the absence of inter-triangle couplings) in the J -J plane. It gives a quantum phase diagram that has two gapless antiferromagnetically ordered phases separated by the spin-gapped trimerized singlet phase. The trimerized singlet ground state is found to be stable on J = 0 line (the nearest-neighbor case), and on both sides of it for J = 0, in an extended region bounded by the critical lines of transition to the gapless antiferromagnetic phases. The gapless phase in the negative J region has a coplanar 120• -antiferromagnetic order with √ 3 × √ 3 structure. In this phase, all the magnetic moments are of equal length, and the angle between any two of them on a triangle is exactly 120• . The magnetic lattice in this case has a unit-cell consisting of three triangles. The other gapless phase, in the positive J region, is found to exhibit a different coplanar antiferromagnetic order with ordering wavevector q = (0, 0). Here, two magnetic moments in a triangle are of same magnitude, but shorter than the third. While the angle between two short moments is 120• − 2δ, it is 120• + δ between a short and the long one. Only when J = J , their magnitudes become equal and the relative-angles 120• . The magnetic lattice in this q = (0, 0) phase has the translational symmetry of the Kagomé lattice with triangular unit-cells of reduced (isosceles) symmetry. This reduction in the point-group symmetry is found to show up as a difference in the intensities of certain Bragg peaks, whose ratio, I (1,0) /I (0,1) = 4 sin 2 ( π 6 + δ), presents an experimental measure of the deviation, δ, from the 120• order.

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“…Consequently, we analyzed the low-temperature centrosymmetric → non-centrosymmetric phase transition [4,5] using the symmetry-mode analysis as described in [20][21][22] 6 . This allowed us to single out the most (2) 0.25 (tables 3 and 4) 7 .…”

Section: Resultsmentioning

confidence: 99%

“…The 51 V-NMR study revealed that 3 Author to whom any correspondence should be addressed. the V(1) atom shows a spin gap character with a spin-singlet ground state, while the V(2) and V(3) atoms maintain their local magnetic moments [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Integrated-Optic Add/Drop Multiplexing of Free-Space Waves for Intra-Board Chip-to-Chip Optical Interconnects

Ohmori

Imaoka

Ura

et al. 2005

Jpn. J. Appl. Phys.

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The crystal structure of NaV 6 O 11 stays hexagonal at least to 8.06 GPa at room temperature as deduced from x-ray powder and single-crystal diffraction data measured in diamond anvil cells. The material is more compressible along the c axis and the distortion of the hexagonal close packing increases on compression. Its compressibility is given by a Murnaghan equation of state with the zero-pressure bulk modulus B 0 = 177(9) GPa and the unit-cell volume at ambient pressure V 0 = 369.9(4)Å 3 (B = 4.00). The occurrence of the pressure-induced second-order P6 3 /mmc → P6 3 mc phase transition has been discussed on the basis of symmetry-mode analysis of the high-pressure single-crystal data.

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NMR study of the magnetic properties of NaV6O11: spin-gap behavior of Kagomé lattice

Cited by 10 publications

References 3 publications

Phase transitions and electrical transport in the mixed-valence V2+/V3+ oxide BaV10O15

Phase transitions and electrical transport in the mixed-valence V2+/V3+ oxide BaV10O15

Plaquette-triplon analysis of magnetic disorder and order in a trimerized spin-1 kagome Heisenberg antiferromagnet

Integrated-Optic Add/Drop Multiplexing of Free-Space Waves for Intra-Board Chip-to-Chip Optical Interconnects

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