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Chow, K. H.; Pattenden, P.A.; Blundell, S. J.; Hayes, W.; Pratt, F. L.; Jestädt, T; Green, Mark; Millburn, J. E.; Rosseinsky, Matthew J.; Hitti, B.; Dunsiger, S. R.; Kiefl, R. F.; Chen, C.; Chowdhury, A.J.S.

doi:10.1103/physrevb.53.r14725

Cited by 21 publications

(9 citation statements)

References 19 publications

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“…Comparison with other materials. µSR studies of the doped nickelate La 2−x Sr x NiO 4 [41][42][43] yield an abrupt but continuous frequency onset at T N with a small value of the critical exponent β, similar to our results in La 4 Ni 3 O 8 .…”

Section: Abrupt Onset At Tnsupporting

confidence: 89%

Charge-stripe order, antiferromagnetism, and spin dynamics in the cuprate-analog nickelate La4Ni3O8

et al. 2019

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We report results of a muon spin rotation (µSR) study of the cuprate-analog nickelate La4Ni3O8, which undergoes a transition at 105 K to a low-temperature phase with charge-stripe and antiferromagnetic (AFM) order on square planar NiO2 layers. Zero-field µSR shows that the AFM transition is abrupt, commensurate and has a quasi-2D character below ∼25 K. Comparison of observed muon precession frequencies with Ni dipolar field calculations yields Ni moments 0.5µB . Dynamic muon spin relaxation above 105 K suggests critical slowing of Ni spin fluctuations, but is inconsistent with corresponding 139 La NMR results. Critical slowing and an abrupt transition are also observed in the planar cuprate AFM La2CuO 4+δ , where they are taken as evidence for weakly interplanar-coupled two-dimensional AFM spin fluctuations, but our µSR data do not agree quantitatively with theoretical predictions for this scenario when applied to the nickelate.

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Section: Abrupt Onset At Tnsupporting

confidence: 89%

Charge-stripe order, antiferromagnetism, and spin dynamics in the cuprate-analog nickelate La4Ni3O8

et al. 2019

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“…If γ is a measure of chargestripe fluctuations, as discussed above, then it appears that the abrupt decrease in Γ below T co may be a direct result of charge order. Low-frequency probes such as nuclear magnetic resonance [19,20] and muon-spin relaxation [21,22] should be sensitive to the variations in Γ, and it appears that such variations above T so have been detected in studies of related nickelates [19,21,22]. The sensitivity of magnetic damping to charge order may also be relevant to the mechanism of the "wipe-out" effect observed in nuclear-quadrupole-resonance studies in cuprates [23,24,25].…”

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confidence: 99%

Freezing of a Stripe Liquid

et al. 2002

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The existence of a stripe-liquid phase in a layered nickelate, La(1.725)Sr(0.275)NiO(4), is demonstrated through neutron scattering measurements. We show that incommensurate magnetic fluctuations evolve continuously through the charge-ordering temperature, although an abrupt decrease in the effective damping energy is observed on cooling through the transition. The energy and momentum dependence of the magnetic scattering are parametrized with a damped-harmonic-oscillator model describing overdamped spin waves in the antiferromagnetic domains defined instantaneously by charge stripes.

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“…Many recent studies (Chow et al , 1996; Sachan et al , 1995; Pellegrin et al , 1996; Takeda et al , 1990; Strangfeld et al , 1991; Kato et al , 1991; Cheong et al , 1994; Chen et al , 1993; Cava et al , 1991; Granados et al , 1993) have been focused on the Ni +II /Ni +III La 2− x Sr x NiO 4±δ oxides with the K 2 NiF 4 structure. In these nickel system compounds, much higher doping levels are required to induce metal-insulator transitions than in the analogous cuprates, La 2− x Sr x CuO 4±δ , with truly metallic behaviour occurring only at nickel oxidation states higher than +III.…”

Section: Introductionmentioning

confidence: 99%

Rietveld refinement of X-ray powder data and bond-valence calculations of NdSrNi_0.5Cr_0.5O_4-δ compound

et al. 2010

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International audienceCompound from the solid-solution NdSrNi1−xCrxO4−δ, 0≤x≤1, has been prepared using conventional solid-state method and was characterized by X-ray powder diffraction. The NdSrNi0.5Cr0.5O4−δ sample shows the adoption of the K2NiF4-type structure based on the tolerance factor calculation. X-ray diffraction analysis using the Rietveld method was carried out and it was found that NdSrNi0.5Cr0.5O4−δ compound crystallizes in tetragonal symmetry with space group I4/mmm. The lattice parameters are found to be at room temperature, a=3.8012(3) Å and c=12.4812(1) Å. For X-ray diffraction data, the reliability factors are RB=0.034, Rwp=0.089, and χ2=1.17. Bond-valence sum calculations were performed for nickel and chromium. The changes in unit-cell parameters are discussed in terms of oxygen stoichiometry and transition metal (3d) oxidation state from the perspective of the Brown bond-valence sum calculation theory

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Muon-spin-relaxation studies of magnetic order in heavily dopedLa2−xSrxNi

Cited by 21 publications

References 19 publications

Charge-stripe order, antiferromagnetism, and spin dynamics in the cuprate-analog nickelate La4Ni3O8

Charge-stripe order, antiferromagnetism, and spin dynamics in the cuprate-analog nickelate La4Ni3O8

Freezing of a Stripe Liquid

Rietveld refinement of X-ray powder data and bond-valence calculations of NdSrNi_0.5Cr_0.5O_4-δ compound

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Muon-spin-relaxation studies of magnetic order in heavily dopedLa2−xSrxNi

Cited by 21 publications

References 19 publications

Charge-stripe order, antiferromagnetism, and spin dynamics in the cuprate-analog nickelate La4Ni3O8

Charge-stripe order, antiferromagnetism, and spin dynamics in the cuprate-analog nickelate La4Ni3O8

Freezing of a Stripe Liquid

Rietveld refinement of X-ray powder data and bond-valence calculations of NdSrNi0.5Cr0.5O4-δ compound

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Product

Resources

About

Rietveld refinement of X-ray powder data and bond-valence calculations of NdSrNi_0.5Cr_0.5O_4-δ compound