Structure, and magnetic and transport behavior of twinned Ce{sub 2}Rh{sub 3}(Pb,Bi){sub 5}

Single crystals of a new compound, Ce{sub 2}Rh{sub 3}(Pb,Bi){sub 5}, have been grown via a flux-growth technique using molten Pb as a solvent. The compound has been characterized by single crystal X-ray diffraction and found to be of the orthorhombic Y{sub 2}Rh{sub 3}Sn{sub 5} structure type [Cmc2{s...

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Bibliographic Details
Published in:Journal of solid state chemistry 2007-08, Vol.180 (8)
Main Authors: Thomas, Evan Lyle, Kim, Moo Sung, Sokolov, D.A., Bennett, Marcus C., Aronson, M.C., Chan, Julia Y.
Format: Article
Language:English
Subjects:
BISMUTH COMPOUNDS
CERIUM COMPOUNDS
CRYSTAL GROWTH
ELECTRIC CONDUCTIVITY
FERMI LEVEL
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
LATTICE PARAMETERS
LEAD COMPOUNDS
MAGNETIZATION
MONOCRYSTALS
NEEL TEMPERATURE
ORTHORHOMBIC LATTICES
RHODIUM COMPOUNDS
TEMPERATURE RANGE 0000-0013 K
TWINNING
X-RAY DIFFRACTION
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Summary:Single crystals of a new compound, Ce{sub 2}Rh{sub 3}(Pb,Bi){sub 5}, have been grown via a flux-growth technique using molten Pb as a solvent. The compound has been characterized by single crystal X-ray diffraction and found to be of the orthorhombic Y{sub 2}Rh{sub 3}Sn{sub 5} structure type [Cmc2{sub 1} (No. 36), Z=4] with lattice parameters a=4.5980(2), b=27.1000(17) and c=7.4310(4) A, with V=925.95(9) A{sup 3}. Ce{sub 2}Rh{sub 3}(Pb,Bi){sub 5} has a complex crystal structure containing Ce atoms encased in Rh-X (X=Pb/Bi) pentagonal and octagonal channels in [100], with polyanions similar to those found in Ce{sub 2}Au{sub 3}In{sub 5} and Yb{sub 2}Pt{sub 3}Sn{sub 5}. Magnetization measurements find that Ce{sub 2}Rh{sub 3}(Pb,Bi){sub 5} is a quasi-two-dimensional system, where the Ce moments are spatially well-localized. Heat capacity measurements show a transition at the Neel temperature of 1.5 K. Evidence for Fermi surface nesting is found in electrical resistivity measurements, and we argue that Ce{sub 2}Rh{sub 3}(Pb,Bi){sub 5} is very near a metal-insulator transition in zero field. - Graphical abstract: This manuscript reports the crystal growth, structure, and magnetic and transport properties of Ce{sub 2}Rh{sub 3}(Pb,Bi){sub 5}. Magnetization measurements on single crystals find that Ce{sub 2}Rh{sub 3}(Pb,Bi){sub 5} is a quasi-two-dimensional system, where the Ce moments are spatially well-localized.
ISSN:0022-4596
1095-726X
DOI:10.1016/j.jssc.2007.06.012