Open AccessSignature of CEF-phonon coupling in Kondo lattice system CeCuGa3
Author(s) -
V. K. Anand,
Alberto Fraile,
D. T. Adroja,
Shivani Sharma,
Rajesh Tripathi,
C. Ritter,
C. de la Fuente,
Pabitra Kumar Biswas⃰,
Victoria García Sakai,
A. del Moral,
A. M. Strydom
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2164/1/012056
Subject(s) - condensed matter physics , physics , inelastic neutron scattering , antiferromagnetism , phonon , coupling (piping) , kondo effect , lattice (music) , magnetic field , magnetic susceptibility , anomaly (physics) , inelastic scattering , scattering , materials science , electrical resistivity and conductivity , quantum mechanics , acoustics , metallurgy
We present the results of inelastic neutron scattering (INS) measurements on Kondo lattice heavy fermion CeCuGa 3 . The low-temperature magnetic susceptibility exhibits an anomaly near 2.6 K associated with an antiferromagnetic transition which is further confirmed by the heat capacity measurement. The analysis of magnetic heat capacity C mag ( T ) based on the crystal electric field (CEF) model reveals an overall CEF splitting of ∼ 21 meV. The INS data reveal two strong magnetic excitations near 4.5 and 6.9 meV, which, however failed to reproduce the observed C mag ( T ). We therefore analyze the INS data by a model based on magneto-elastic (i.e. CEF-phonon) coupling which suggests that the excitations observed near 4.5 and 6.9 meV originate from the CEF-phonon coupling as observed in CeCuAl 3 and CeAuAl 3 .