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

Abstract

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.

Authors:
; ;  [1]
  1. Department of Physics, University of Nevada, Las Vegas, Nevada 89154-4002 (United States)
Publication Date:
OSTI Identifier:
20662265
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 70; Journal Issue: 21; Other Information: DOI: 10.1103/PhysRevB.70.214526; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Kumar, Ravhi S, Cornelius, A L, Sarrao, J L, and Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545. Compressibility of CeMIn{sub 5} and Ce{sub 2}MIn{sub 8} (M=Rh, Ir, and Co) compounds. United States: N. p., 2004. Web. doi:10.1103/PhysRevB.70.214526.
Kumar, Ravhi S, Cornelius, A L, Sarrao, J L, & Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545. Compressibility of CeMIn{sub 5} and Ce{sub 2}MIn{sub 8} (M=Rh, Ir, and Co) compounds. United States. https://doi.org/10.1103/PhysRevB.70.214526
Kumar, Ravhi S, Cornelius, A L, Sarrao, J L, and Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545. 2004. "Compressibility of CeMIn{sub 5} and Ce{sub 2}MIn{sub 8} (M=Rh, Ir, and Co) compounds". United States. https://doi.org/10.1103/PhysRevB.70.214526.
@article{osti_20662265,
title = {Compressibility of CeMIn{sub 5} and Ce{sub 2}MIn{sub 8} (M=Rh, Ir, and Co) compounds},
author = {Kumar, Ravhi S and Cornelius, A L and Sarrao, J L and Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545},
abstractNote = {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.},
doi = {10.1103/PhysRevB.70.214526},
url = {https://www.osti.gov/biblio/20662265}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 21,
volume = 70,
place = {United States},
year = {Wed Dec 01 00:00:00 EST 2004},
month = {Wed Dec 01 00:00:00 EST 2004}
}