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

doi:10.1088/1742-6596/2164/1/012056

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

Physics

Research output: Contribution to journal › Conference article › peer-review

Abstract

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 language	English
Article number	012056
Journal	Journal of Physics: Conference Series
Volume	2164
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/2164/1/012056
Publication status	Published - 17 Mar 2022
Event	2020 International Conference on Strongly Correlated Electron Systems, SCES 2020 - Campinas, Virtual, Brazil Duration: 27 Sept 2021 → 1 Oct 2021

ASJC Scopus subject areas

General Physics and Astronomy

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10.1088/1742-6596/2164/1/012056

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@article{98c95f25e7234270ad9df985e5cac34c,

title = "Signature of CEF-phonon coupling in Kondo lattice system CeCuGa3",

abstract = "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.",

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

note = "Publisher Copyright: {\textcopyright} Published under licence by IOP Publishing Ltd.; 2020 International Conference on Strongly Correlated Electron Systems, SCES 2020 ; Conference date: 27-09-2021 Through 01-10-2021",

year = "2022",

month = mar,

day = "17",

doi = "10.1088/1742-6596/2164/1/012056",

language = "English",

volume = "2164",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

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TY - JOUR

T1 - Signature of CEF-phonon coupling in Kondo lattice system CeCuGa3

AU - Anand, V. K.

AU - Fraile, A.

AU - Adroja, D. T.

AU - Sharma, Shivani

AU - Tripathi, Rajesh

AU - Ritter, C.

AU - De La Fuente, C.

AU - Biswas, P. K.

AU - Garcia Sakai, V.

AU - Del Moral, A.

AU - Strydom, A. M.

PY - 2022/3/17

Y1 - 2022/3/17

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85127259318&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/2164/1/012056

DO - 10.1088/1742-6596/2164/1/012056

M3 - Conference article

AN - SCOPUS:85127259318

SN - 1742-6588

VL - 2164

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - 1

M1 - 012056

T2 - 2020 International Conference on Strongly Correlated Electron Systems, SCES 2020

Y2 - 27 September 2021 through 1 October 2021

ER -

Signature of CEF-phonon coupling in Kondo lattice system CeCuGa₃

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