Signature of CEF-phonon coupling in Kondo lattice system CeCuGa3

V. K. Anand, A. Fraile, D. T. Adroja, Shivani Sharma, Rajesh Tripathi, C. Ritter, C. De La Fuente, P. K. Biswas, V. Garcia Sakai, A. Del Moral, A. M. Strydom

Research output: Contribution to journalConference articlepeer-review


We present the results of inelastic neutron scattering (INS) measurements on Kondo lattice heavy fermion CeCuGa3. 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 CeCuAl3 and CeAuAl3.

Original languageEnglish
Article number012056
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 17 Mar 2022
Event2020 International Conference on Strongly Correlated Electron Systems, SCES 2020 - Campinas, Virtual, Brazil
Duration: 27 Sept 20211 Oct 2021

ASJC Scopus subject areas

  • General Physics and Astronomy


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