Compressibility of CeMIn{sub 5} and Ce{sub 2}MIn{sub 8} (M=Rh, Ir, and Co) compounds

Journal Article · Wed Dec 01 00:00:00 EST 2004 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.70.214526· OSTI ID:20662265

Kumar, Ravhi S; Cornelius, A L; Sarrao, J L ^[1]

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1. Department of Physics, University of Nevada, Las Vegas, Nevada 89154-4002 (United States)

The lattice parameters of the tetragonal compounds CeMIn{sub 5} and Ce{sub 2}MIn{sub 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 hydrostatic and quasihydrostatic conditions at room temperature. The addition of MIn{sub 2} layers to the parent CeIn{sub 3} compound is found to stiffen the lattice as the 2-layer systems (average of bulk modulus values B{sub 0} is 70.4 GPa) have a larger B{sub 0} than CeIn{sub 3} (67 GPa), while the 1-layer systems are even stiffer (average of B{sub 0} is 81.4 GPa). Estimating the hybridization using parameters from tight binding calculations shows that the dominant hybridization is fp in nature between the Ce and In atoms. The values of V{sub pf} at the pressure where the superconducting transition temperature T{sub c} reaches a maximum is the same for all CeMIn{sub 5} compounds. By plotting the maximum values of the superconducting transition temperature T{sub c} versus c/a for the studied compounds and Pu-based superconductors, we find a universal T{sub c} versus c/a behavior when these quantities are normalized appropriately. These results are consistent with magnetically mediated superconductivity.

• OSTI ID: 20662265
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 70, Issue 21; Other Information: DOI: 10.1103/PhysRevB.70.214526; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
ANTIFERROMAGNETIC MATERIALS
CERIUM ALLOYS
COBALT ALLOYS
COBALT COMPOUNDS
COMPRESSIBILITY
HYDROSTATICS
INDIUM ALLOYS
IRIDIUM ALLOYS
LATTICE PARAMETERS
LAYERS
PLUTONIUM ALLOYS
PRESSURE DEPENDENCE
PRESSURE RANGE GIGA PA
RHODIUM ALLOYS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE RANGE 0273-0400 K
TRANSITION TEMPERATURE