A reduced moment antiferromagnetic Kondo lattice compound: Ce8Pd24Ga

Adroja, D. T.; Kockelmann, W.; Hillier, A. D.; So, J.-Y.; Knight, Kevin S.; Rainford, B.D.

doi:10.1016/j.jmmm.2003.12.1148

Cited by 6 publications

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“…Removal of the inversion symmetry thus allows a bigger space for the lighter atom. As a consequence, the boron site (Wyckoff position: 1b) found to be fully occupied in tetragonal CePt 3 B in contrast to cubic CePd 3 B x , CePd 3 Si x , CePd 3 Ga x ( x < 1), etc. The tetragonal structure remains stable even if boron is replaced by the larger-sized silicon in stoichiometric CePt 3 Si, whereas the solubility limit of silicon in cubic CePd 3 Si x is only 30% .…”

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confidence: 99%

Structural Transformation in Inverse-Perovskite REPt₃B (RE = Sm and Gd–Tm) Associated with Large Volume Reduction

et al. 2017

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In this work, we report the structural phase transformation of tetragonal inverse-perovskite REPtB (RE = Sm, and Gd-Tm) compounds to cubic perovskite structure, with a large volume reduction of about 9% (reduction of the c axis, ∼17%; increase in the a axis, ∼5%). The structural stability of the cubic phase, however, could only be maintained by lowering the lattice parameter of the off-stoichiometric REPtB (x < 1), formed in the process of annealing. The combined effect of phase transformation and stoichiometric defects is argued to be responsible for the observed volume collapse. Unexpectedly, the application of a large hydrostatic pressure of ∼20 GPa does not have any significant effect on the crystal structure. Neutron diffraction studies and heat capacity measurements unambiguously confirm different magnetic transition temperatures in the tetragonal and cubic phases. The different physical properties of these two phases demonstrate the interrelationship between the crystal chemistry and the physics of the system. The synthetic route to cubic REPtB identified in this work may be utilized to prepare new ternary rare-earth intermetallics in a cubic perovksite form, which was previously found to facilitate unconventional superconductivity.

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Section: Introductionmentioning

confidence: 99%

Structural Transformation in Inverse-Perovskite REPt₃B (RE = Sm and Gd–Tm) Associated with Large Volume Reduction

et al. 2017

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Low-temperature transport and thermodynamic properties of dense Kondo alloys Ce8Pd24(Al1−

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Bashir

Strydom

et al. 2017

Journal of Alloys and Compounds

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Interplay of antiferromagnetism and Kondo effect in(Ce1−xLax)

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Britz

et al. 2017

Journal of Physics and Chemistry of Solids

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A reduced moment antiferromagnetic Kondo lattice compound: Ce8Pd24Ga

Cited by 6 publications

References 5 publications

Structural Transformation in Inverse-Perovskite REPt₃B (RE = Sm and Gd–Tm) Associated with Large Volume Reduction

Structural Transformation in Inverse-Perovskite REPt₃B (RE = Sm and Gd–Tm) Associated with Large Volume Reduction

Low-temperature transport and thermodynamic properties of dense Kondo alloys Ce8Pd24(Al1−

Interplay of antiferromagnetism and Kondo effect in(Ce1−xLax)

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A reduced moment antiferromagnetic Kondo lattice compound: Ce8Pd24Ga

Cited by 6 publications

References 5 publications

Structural Transformation in Inverse-Perovskite REPt3B (RE = Sm and Gd–Tm) Associated with Large Volume Reduction

Structural Transformation in Inverse-Perovskite REPt3B (RE = Sm and Gd–Tm) Associated with Large Volume Reduction

Low-temperature transport and thermodynamic properties of dense Kondo alloys Ce8Pd24(Al1−

Interplay of antiferromagnetism and Kondo effect in(Ce1−xLax)

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Structural Transformation in Inverse-Perovskite REPt₃B (RE = Sm and Gd–Tm) Associated with Large Volume Reduction

Structural Transformation in Inverse-Perovskite REPt₃B (RE = Sm and Gd–Tm) Associated with Large Volume Reduction