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Specific heat of the Ce(Cu 1− x Ni x ) 4 Ga alloys
Author(s) -
Synoradzki K.,
Kowalczyk A.,
Toliński T.
Publication year - 2015
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.201451706
Subject(s) - hexagonal crystal system , materials science , specific heat , electron , crystallography , electronic structure , intermetallic , condensed matter physics , analytical chemistry (journal) , chemistry , metallurgy , physics , alloy , quantum mechanics , chromatography
The influence of the modification of the 3d electronic states in the heavy fermion compound CeCu 4 Ga by substitution of Cu by Ni is reported. It has been verified that the crystallographic structure is hexagonal of the CaCu 5 type and is preserved for all the x values in the alloys Ce(Cu 1− x Ni x ) 4 Ga. The measurements of the specific heat C p ( T ) have revealed that the huge electronic specific coefficient γ = 3.3 J mol −1 K −2 for CeCu 4 Ga is reduced with the progressive Ni addition and follows the behavior of the hybridization parameter of the Ce f states with the conduction electrons. The analysis of the specific heat of the non‐magnetic reference compound LaCu 4 Ga has shown that including the mass correction corresponding to the change of Ce by La and Cu by Ni does not provide a correct estimation of the phonon term in the Ce(Cu 1− x Ni x ) 4 Ga alloys.