X-ray characterization for the charge ordering on β(β′)-vanadium oxide bronzes

Yamaura, Jun‐ichi; Yamauchi, Touru; Ninomiya, Emi; Sawa, Hiroshi; Isobe, Masahiko; Yamada, Hiroyuki; Ueda, Yutaka

doi:10.1016/j.jmmm.2003.11.148

Cited by 16 publications

(11 citation statements)

References 6 publications

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“…The present (Table 1) and recent temperature studies of vanadium bronzes including H -Cu 0.65 V 3 O 5 (Yamaura et al, 2002) showed that the a and c axes shrank monotonically, whereas the b axis was almost constant from 300 to 20 K. It was also suggested that the V2 atoms can move transversely to the V2 ladder forming superstructural modulations. The most recent X-ray power diffraction characterization of H -Cu 0.66 V 2 O 5 under pressure (Yamaura et al, 2004) revealed that the length of the b axis remained constant with increasing applied pressure, while the other axes decreased monotonically with greater linear compressibility in the a-direction than in the c-direction. The anisotropic dimensional changes of Cu-bronzes involving the structural deformations of the V2 ladder under pressure were related to the pressure-induced superconductivity in the Cubronzes.…”

Section: Resultsmentioning

confidence: 99%

Crystal structure study of a β′-copper vanadium bronze, Cu_xV₂O₅ (x = 0.63), by X-ray and convergent beam electron diffraction

Streltsov

Nakashima

Sobolev

et al. 2005

Acta Crystallogr Sect B

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The single-crystal structure of a beta'-copper vanadium bronze, Cu0.63V2O5, has been studied at room temperature and 9.6 K, and compared with that of the beta-sodium vanadium bronze, Na0.33V2O5, structure. No convincing evidence to oppose an assignment of centrosymmetric C2/m symmetry to the structure was identified using the X-ray data. A subsequent convergent beam electron diffraction (CBED) experiment was performed and confirmed the C2/m space group. The oxygen-vanadium atom framework of Cu0.63V2O5 is close to that of Na0.33V2O5. However, in the copper compound the Cu atoms are located in two positions: Cu1 in the 4(i) position with x=0.541, y=0 and z=0.345, and Cu2 in the 8(j) position with x=0.529, y=0.038 and z=0.357. The crystal structure changes little with temperature. Disorder of the Cu ion over two sites is seen at 9.6 K. This suggests that distribution of the Cu atoms over two sites is of a more static than dynamic nature.

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Section: Resultsmentioning

confidence: 99%

Crystal structure study of a β′-copper vanadium bronze, Cu_xV₂O₅ (x = 0.63), by X-ray and convergent beam electron diffraction

Streltsov

Nakashima

Sobolev

et al. 2005

Acta Crystallogr Sect B

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“…Although it retains the same space group below T CO , the b cell parameter becomes six times as large as that above T A . 10,14,21 Thus, the sixfold superstructure is deeply concerned with the charge ordering.…”

Section: 2125mentioning

confidence: 99%

Local Electric Properties of β-Ag_0.33V₂O₅Studied by⁵¹V NMR

et al. 2009

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Local spin and charge properties were studied on β-Ag0.33V2O5, a pressure-induced superconductor, at ambient pressure using 51 V-NMR and zero-field-resonance (ZFR) techniques. Three inequivalent Vi sites (i=1, 2, and 3) were identified from 51 V-NMR spectra and the principal axes of the electric-field-gradient (EFG) tensor were determined in a metallic phase and the following charge-ordering phase. We found from the EFG analysis that the V1 sites are in a similar local environment to the V3 sites. This was also observed in ZFR spectra as pairs of signals closely located with each other. These results are well explained by a charge-sharing model where a 3d 1 electron is shared within a rung in both V1-V3 and V2-V2 two-leg ladders.

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“…[1][2][3] Vanadium oxides especially exhibit a wide range of oxidation states, coordination modes, polymorphs and these results in many fascinating physical phenomena, such as charge and spin ordering, superconductivity, and insulator-metal transitions (IMT). [4][5][6][7] Several polymorphs of VO 2 , stable at room temperature, have been reported such as the pure M1, A, B, D and N polymorphs or the substituted M2, M3 and M4 phases. 5,8,9 Among these polymorphs, except M1, all other polymorphs are either in their synthesis stage or very early stage of understanding their properties and searching for possible applications.…”

Section: Introductionmentioning

confidence: 99%

Presence of Peierls pairing and absence of insulator-to-metal transition in VO₂ (A): a structure–property relationship study

Popuri

Artemenko

Decourt

et al. 2017

Phys. Chem. Chem. Phys.

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Layered vanadium oxides have been extensively explored due to their interesting metal-insulator transitions and energy conversion/storage applications. In the present study, we have successfully synthesized VO (A) polymorph powder samples by a single-step hydrothermal synthesis process and consolidated them using spark plasma sintering. The structural and electronic properties of VO (A) are measured over a large temperature range from liquid helium, across the structural transition (400-440 K) and up to 500 K. The structural analysis around this transition reveals an antiferrodistorsive to partially ferrodistorsive ordering upon cooling. It is followed by a progressive antiferromagnetic spin pairing which fully settles at about 150 K. The transport measurements show that, in contrast to the rutile archetype VO (R/M1), the structural transition comes with a transition from semiconductor to band-type insulator. Under these circumstances, we propose a scenario with a high temperature antiferrodistorsive paramagnetic semiconducting phase, followed by an intermediate regime with a partially ferrodistorsive paramagnetic semiconducting phase, and finally a low temperature partially ferrodistorsive antiferromagnetic band insulator phase with a possible V-V Peierls-type pairing.

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X-ray characterization for the charge ordering on β(β′)-vanadium oxide bronzes

Cited by 16 publications

References 6 publications

Crystal structure study of a β′-copper vanadium bronze, Cu_xV₂O₅ (x = 0.63), by X-ray and convergent beam electron diffraction

Crystal structure study of a β′-copper vanadium bronze, Cu_xV₂O₅ (x = 0.63), by X-ray and convergent beam electron diffraction

Local Electric Properties of β-Ag_0.33V₂O₅Studied by⁵¹V NMR

Presence of Peierls pairing and absence of insulator-to-metal transition in VO₂ (A): a structure–property relationship study

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X-ray characterization for the charge ordering on β(β′)-vanadium oxide bronzes

Cited by 16 publications

References 6 publications

Crystal structure study of a β′-copper vanadium bronze, Cu x V2O5 (x = 0.63), by X-ray and convergent beam electron diffraction

Crystal structure study of a β′-copper vanadium bronze, Cu x V2O5 (x = 0.63), by X-ray and convergent beam electron diffraction

Local Electric Properties of β-Ag0.33V2O5Studied by51V NMR

Presence of Peierls pairing and absence of insulator-to-metal transition in VO2 (A): a structure–property relationship study

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Crystal structure study of a β′-copper vanadium bronze, Cu_xV₂O₅ (x = 0.63), by X-ray and convergent beam electron diffraction

Crystal structure study of a β′-copper vanadium bronze, Cu_xV₂O₅ (x = 0.63), by X-ray and convergent beam electron diffraction

Local Electric Properties of β-Ag_0.33V₂O₅Studied by⁵¹V NMR

Presence of Peierls pairing and absence of insulator-to-metal transition in VO₂ (A): a structure–property relationship study