Compressibility of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Ce</mml:mi><mml:mi>M</mml:mi><mml:msub><mml:mi mathvariant="normal">In</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi mathvariant="normal">Ce</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>M</mml:mi><mml:msub><mml:mi mathvariant="normal">In</mml:mi><mml:mn>8</mml:m

Kumar, Ravhi S.; Cornelius, Andrew; Sarrao, J. L.

doi:10.1103/physrevb.70.214526

Cited by 30 publications

(14 citation statements)

References 52 publications

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“…we obtain B 0 = 81.1 ± 0.3 GPa and B 0 = 5.8 ± 0.1. Using the simple Murnaghan equation 33 results in the same fitted values for B 0 and B 0 within errors.These values are similar to those reported for other members of the Ce n M m In 3n+2m family 34. In these compounds, it was observed that adding MIn 2 layers stiffens the structure and increases the bulk modulus: B 0 = 67 GPa for CeIn3 , average B 0 = 70.4 GPa for Ce 2 MIn 8 (2 layers CeIn 3 + 1 layer MIn 2 ) and average B 0 = 81.4 GPa for CeMIn 5 (1 layer CeIn 3 + 1 layer MIn 2 ).…”

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confidence: 89%

Investigation of the commensurate magnetic structure in the heavy-fermion compound CePt2In7 using magnetic resonant x-ray diffraction

et al. 2017

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We investigated the magnetic structure of the heavy fermion compound CePt 2 In 7 below T N = 5.34(2) K using magnetic resonant X-ray diffraction at ambient pressure. The magnetic order is characterized by a commensurate propagation vector k 1/2 = 1 2 , 1 2 , 1 2 with spins lying in the basal plane. Our measurements did not reveal the presence of an incommensurate order propagating along the high symmetry directions in reciprocal space but cannot exclude other incommensurate modulations or weak scattering intensities. The observed commensurate order can be described equivalently by either a single-k structure or by a multi-k structure. Furthermore we explain how a commensurate-only ordering may explain the broad distribution of internal fields observed in nuclear quadrupolar resonance experiments (Sakai et al. 2011, Phys. Rev. B 83 140408) that was previously attributed to an incommensurate order. We also report powder X-ray diffraction showing that the crystallographic structure of CePt 2 In 7 changes monotonically with pressure up to P = 7.3 GPa at room temperature. The determined bulk modulus B 0 = 81.1(3) GPa is similar to the ones of the Ce-115 family. Broad diffraction peaks confirm the presence of pronounced strain in polycrystalline samples of CePt 2 In 7 . We discuss how strain effects can lead to different electronic and magnetic properties between polycrystalline and single crystal samples.

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confidence: 89%

Investigation of the commensurate magnetic structure in the heavy-fermion compound CePt2In7 using magnetic resonant x-ray diffraction

et al. 2017

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“…The powder X-ray diffraction (XRD) patterns of both materials were indexed in the Fm3m (#225) space group, the typical cubic unit cell of PBAs. [ 33 ] Their structures were investigated by Rietveld refi nement ( Figure 3 ), [ 35 ] using compositions constrained by the chemical analysis and TGA measurements, i.e., 5% [Fe(CN) 6 ] n − vacancies, and 14.05 wt% water for 23-PBA or 4.86 wt% water for 07-PBA (Table S1, Supporting Information). The empty N site of the [Fe(CN) 6 ] n − vacancy is occupied by water, fulfi lling the octahedral environment of Fe.…”

Section: Materials Characterization-infl Uence Of Watermentioning

confidence: 99%

“…The crystal structure of PBA ( Figure 1 ) is similar to the ReO 3 and perovskite structure types, being comprised of cubes with TM residing on the corners and bridged by cyano groups along the edges, and thus generating a large central cavity (the A site in the perovskite structure). [ 33 ] Vacancies resulting from the absence of complete [TM′(CN) 6 ] 3−/4− units ( x in the above formula), are fi lled by water molecules with the O atoms occupying the empty sites, and coordinated to the adjacent TM. Water molecules can also be found within the central cavity (A site), either in the exact The major advantage of Mg batteries relies on their promise of employing an Mg metal negative electrode, which offers much higher energy density compared to graphitic carbon.…”

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confidence: 99%

Prussian Blue MgLi Hybrid Batteries

2016

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The major advantage of Mg batteries relies on their promise of employing an Mg metal negative electrode, which offers much higher energy density compared to graphitic carbon. However, the strong coulombic interaction of Mg2+ ions with anions leads to their sluggish diffusion in the solid state, which along with a high desolvation energy, hinders the development of positive electrode materials. To circumvent this limitation, Mg metal negative electrodes can be used in hybrid systems by coupling an Li+ insertion cathode through a dual salt electrolyte. Two “high voltage” Prussian blue analogues (average 2.3 V vs Mg/Mg2+; 3.0 V vs Li/Li+) are investigated as cathode materials and the influence of structural water is shown. Their electrochemical profiles, presenting two voltage plateaus, are explained based on the two unique Fe bonding environments. Structural water has a beneficial impact on the cell voltage. Capacities of 125 mAh g−1 are obtained at a current density of 10 mA g−1 (≈C/10), while stable performance up to 300 cycles is demonstrated at 200 mA g−1 (≈2C). The hybrid cell design is a step toward building a safe and high density energy storage system.

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“…A structural phase transition is simply expected as one possible cause for an anomaly in the P dependence of Q , but it is suggested from the x-ray diffraction measurements that no P-induced structural phase transition occurs up to 15 GPa in CeIrIn 5 [24]. We give an example of an anomaly in the P dependence of Q in CeCu 2 Si 2 relevant with the valence crossover.…”

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confidence: 93%

Possibility of Valence-Fluctuatsion-Mediated Superconductivity in Cd-DopedCeIrIn5Probed by In NQR

et al. 2012

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We report on a pressure-induced evolution of exotic superconductivity and spin correlations in CeIr(In(1-x)Cd(x))(5) by means of in-nuclear-quadrupole-resonance (NQR) studies. Measurements of an NQR spectrum and nuclear-spin-lattice-relaxation rate 1/T(1) have revealed that antiferromagnetism induced by Cd doping emerges locally around Cd dopants, but superconductivity is suddenly induced at T(c)=0.7 and 0.9 K at 2.34 and 2.75 GPa, respectively. The unique superconducting characteristics with a large fraction of the residual density of state at the Fermi level which increases with T(c) differ from those for anisotropic superconductivity mediated by antiferromagnetic correlations. By incorporating the pressure dependence of the NQR frequency pointing to the valence change of Ce, we suggest that unconventional superconductivity in the CeIr(In(1-x)Cd(x))(5) system may be mediated by valence fluctuations.

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Compressibility ofCeMIn5andCe2MIn8

Abstract: The lattice parameters of the tetragonal compounds CeM In 5 and Ce 2 M In 8 (M =Rh, Ir and Co) have been studied as a function of pressure up to 15 GPa using a diamond anvil cell under both

Cited by 30 publications

References 52 publications

Investigation of the commensurate magnetic structure in the heavy-fermion compound CePt2In7 using magnetic resonant x-ray diffraction

Investigation of the commensurate magnetic structure in the heavy-fermion compound CePt2In7 using magnetic resonant x-ray diffraction

Prussian Blue MgLi Hybrid Batteries

Possibility of Valence-Fluctuatsion-Mediated Superconductivity in Cd-DopedCeIrIn5Probed by In NQR

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