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Title: CRYSTAL STRUCTURE, SUPERCONDUCTIVITY AND MAGNETISM OF THE QUASI-2D HEAVY FERMION MATERIALS CeTiN5 (T=Co, Rh, Ir)

Abstract

No abstract prepared.

Authors:
; ;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
784310
Report Number(s):
LA-UR-01-4480
TRN: AH200137%%125
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 Jul 2001
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CRYSTAL STRUCTURE; FERMIONS; MAGNETISM; SUPERCONDUCTIVITY

Citation Formats

J. SARRAO, P. PAGLIUSO, and ET AL. CRYSTAL STRUCTURE, SUPERCONDUCTIVITY AND MAGNETISM OF THE QUASI-2D HEAVY FERMION MATERIALS CeTiN5 (T=Co, Rh, Ir). United States: N. p., 2001. Web.
J. SARRAO, P. PAGLIUSO, & ET AL. CRYSTAL STRUCTURE, SUPERCONDUCTIVITY AND MAGNETISM OF THE QUASI-2D HEAVY FERMION MATERIALS CeTiN5 (T=Co, Rh, Ir). United States.
J. SARRAO, P. PAGLIUSO, and ET AL. Sun . "CRYSTAL STRUCTURE, SUPERCONDUCTIVITY AND MAGNETISM OF THE QUASI-2D HEAVY FERMION MATERIALS CeTiN5 (T=Co, Rh, Ir)". United States. doi:. https://www.osti.gov/servlets/purl/784310.
@article{osti_784310,
title = {CRYSTAL STRUCTURE, SUPERCONDUCTIVITY AND MAGNETISM OF THE QUASI-2D HEAVY FERMION MATERIALS CeTiN5 (T=Co, Rh, Ir)},
author = {J. SARRAO and P. PAGLIUSO and ET AL},
abstractNote = {No abstract prepared.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jul 01 00:00:00 EDT 2001},
month = {Sun Jul 01 00:00:00 EDT 2001}
}

Conference:
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  • The crystal structure of the recently discovered heavy-fermion (HF) superconductor CeCoIn{sub 5} (T{sub c} = 2.3 K) has been determined by high-resolution neutron powder diffraction. It is tetragonal (space group P4/mmm), with lattice parameters a = 4.61292(9) {angstrom} and c = 7.5513(2) {angstrom} at ambient conditions. Whereas CeCoIn{sub 5} is isostructural with the HF aniferromagnet CeRhIn{sub 5} and the HF superconductor CeIrIn{sub 5}, its cell constants and its only variable positional parameter, zIn2, differ significantly from the corresponding ones of CeRhIn{sub 5} and CeIrIn{sub 5}. As a result, the distortions of the cuboctahedron [CeIn{sub 3}], which is the key structuralmore » unit in all three materials, are different in CeCoIn{sub 5} from the ones in CeRhIn{sub 5} and CeIrIn{sub 5}. The compounds CeCoIn{sub 5} and CeIrIn{sub 5}, which contain the most distorted (in one or another way) [CeIn{sub 3}] cuboctahedra exhibit superconductivity at ambient pressure below 2.3 K and 0.4 K, respectively. On the other hand, CeRhIn{sub 5}, in which [CeIn{sub 3}] cuboctahedra are the less distorted, and the cubic HF CeIn{sub 3} are antiferromagnets at ambient pressure with T{sub N} = 3.8 K and 10 K respectively; they become superconductors under pressure of 16 kbar and 25 kbar with T{sub c} = 2.1 and 0.2 K respectively.« less
  • No abstract provided.
  • We review the properties of the recently discovered CeMIn5 (M=Co, Ir, Rh) heavy fermion superconductors and discuss the present state of our understanding of these materials. A particular focus is the role that magnetic fields have played in elucidating the properties of these materials. Specifically, we discuss quantum oscillation measurements on CeMIn5, the influence of applied field on the linear coefficient of specific heat, {gamma}, and the nature of the HT phase diagrams in both the normal and superconducting states of these materials.
  • ZrIrGe and HfIrGe crystallize in the TiNiSi-type structure and exhibit a superconducting transition at 2.75K and 4.98K respectively. TiIrGe and HfRhGe have two allotropic varieties and their superconducting properties are strongly influenced by their crystal structure. On the other hand no superconducting transition has been observed above 1.6K for TiTGe (T = Ru, Os, Rh), ZrTGe (T = Ru, Os) and HfTGe (T = Ru, Os) which adopt either the ordered Fe/sub 2/P-type or the TiFeSi-type superstructure. This investigation shows clearly that the TiNiSi-type structure favors occurrence of superconductivity in ternary germanides as previously found for ternary silicides.