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Mixed Valence Properties of CeM 2 Si 2 (M Mn, Fe, Co, Ni, Cu)
Author(s) -
Ammarguellat C.,
Escorne M.,
Mauger A.,
Beaurepaire E.,
Ravet M. F.,
Krill G.,
Lapierre F.,
Haen P.,
Godart C.
Publication year - 1987
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221430117
Subject(s) - antiferromagnetism , valence (chemistry) , paramagnetism , atmospheric temperature range , analytical chemistry (journal) , materials science , condensed matter physics , superconductivity , nickel , chemistry , crystallography , physics , metallurgy , thermodynamics , organic chemistry , chromatography
Lattice parameter measurements in the temperature range 12 to 300 K and L III edge measurements in the range 4.2 to 300 K are performed on the compounds CeM 2 Si 2 (M Mn, Fe, Co, Ni, Cu) to study the valence changes. Magnetic measurements (1.6 to 600 K) for fields up to 1 T confirm antiferromagnetism of CeMn 2 Si 2 ( T N ≈ 370 K) and show enhanced Pauli paramagnetism of mixed valence compounds with M Fe, Co, Ni with spin fluctuation temperatures around 150 K with Co, Ni. Transport properties measurements show that the compounds with M Co, Ni, Fe do not become superconducting down at 18 mK and that a Fermi liquid behaviour exists in the range 40 to 70 K.