Kondo lattice and antiferromagnetic behavior in quaternary CeTAl4Si2 (T = Rh, Ir) single crystals

Maurya, Arvind; Kulkarni, Ruta; Thamizhavel, Arumugam; Paudyal, Durga; Dhar, Sudesh Kumar

doi:10.7566/JPSJ.85.034720

Title: Kondo lattice and antiferromagnetic behavior in quaternary CeTAl₄Si₂ (T = Rh, Ir) single crystals

Abstract

Here, we have explored in detail the anisotropic magnetic properties of CeRhAl₄Si₂ and CeIrAl₄Si₂, which undergo two antiferromagnetic transitions, at T_N1 = 12.6 and 15.5 K, followed by a second transition at T_N2 = 9.4 and 13.8 K, respectively, with the [001]-axis as the relatively easy axis of magnetization. The electrical resistivity at ambient and applied pressure provides evidence of Kondo interaction in both compounds, further supported by a reduced value of the entropy associated with the magnetic ordering. The Sommerfeld coefficient γ is inferred to be 195.6 and 49.4 mJ/(mol K²) for CeRhAl₄Si₂ and CeIrAl₄Si₂, respectively, classifying these materials as moderate heavy-fermion compounds. The crystal electric field energy levels are derived from the peak seen in the Schottky heat capacity. Furthermore, we have also performed electronic structure calculations by using the local spin density approximation + U [LSDA+U] approach, which provide physical insights on the observed magnetic behavior of these two compounds.

Authors:

Maurya, Arvind ^[1]; Kulkarni, Ruta ^[1]; Thamizhavel, Arumugam ^[1]; Paudyal, Durga ^[2]; Dhar, Sudesh Kumar ^[1]

Tata Institute of Fundamental Research, Mumbai (India)
Ames Lab. and Iowa State Univ., Ames, IA (United States)

Publication Date:: Fri Feb 26 00:00:00 EST 2016

Research Org.:: Ames Lab., Ames, IA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1254319

Report Number(s):: IS-J-8966
Journal ID: ISSN 0031-9015

Grant/Contract Number:: AC02-07CH11358

Resource Type:: Accepted Manuscript

Journal Name:: Journal of the Physical Society of Japan

Additional Journal Information:: Journal Volume: 85; Journal Issue: 3; Journal ID: ISSN 0031-9015

Publisher:: Physical Society of Japan

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    Maurya, Arvind, Kulkarni, Ruta, Thamizhavel, Arumugam, Paudyal, Durga, and Dhar, Sudesh Kumar. Kondo lattice and antiferromagnetic behavior in quaternary CeTAl4Si2 (T = Rh, Ir) single crystals.  United States: N. p., 2016. 
Web.  doi:10.7566/JPSJ.85.034720.

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                    Maurya, Arvind, Kulkarni, Ruta, Thamizhavel, Arumugam, Paudyal, Durga, & Dhar, Sudesh Kumar. Kondo lattice and antiferromagnetic behavior in quaternary CeTAl4Si2 (T = Rh, Ir) single crystals.  United States.  https://doi.org/10.7566/JPSJ.85.034720

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                    Maurya, Arvind, Kulkarni, Ruta, Thamizhavel, Arumugam, Paudyal, Durga, and Dhar, Sudesh Kumar. Fri .  
"Kondo lattice and antiferromagnetic behavior in quaternary CeTAl4Si2 (T = Rh, Ir) single crystals".  United States.  https://doi.org/10.7566/JPSJ.85.034720.  https://www.osti.gov/servlets/purl/1254319.

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@article{osti_1254319,

  title        = {Kondo lattice and antiferromagnetic behavior in quaternary CeTAl4Si2 (T = Rh, Ir) single crystals},

  author       = {Maurya, Arvind and Kulkarni, Ruta and Thamizhavel, Arumugam and Paudyal, Durga and Dhar, Sudesh Kumar},

  abstractNote = {Here, we have explored in detail the anisotropic magnetic properties of CeRhAl4Si2 and CeIrAl4Si2, which undergo two antiferromagnetic transitions, at TN1 = 12.6 and 15.5 K, followed by a second transition at TN2 = 9.4 and 13.8 K, respectively, with the [001]-axis as the relatively easy axis of magnetization. The electrical resistivity at ambient and applied pressure provides evidence of Kondo interaction in both compounds, further supported by a reduced value of the entropy associated with the magnetic ordering. The Sommerfeld coefficient γ is inferred to be 195.6 and 49.4 mJ/(mol K2) for CeRhAl4Si2 and CeIrAl4Si2, respectively, classifying these materials as moderate heavy-fermion compounds. The crystal electric field energy levels are derived from the peak seen in the Schottky heat capacity. Furthermore, we have also performed electronic structure calculations by using the local spin density approximation + U [LSDA+U] approach, which provide physical insights on the observed magnetic behavior of these two compounds.},

  doi          = {10.7566/JPSJ.85.034720},

  journal      = {Journal of the Physical Society of Japan},

  number       = 3,

  volume       = 85,

  place        = {United States},

  year         = {Fri Feb 26 00:00:00 EST 2016},

  month        = {Fri Feb 26 00:00:00 EST 2016}

}

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Quantum tricritical point in the temperature-pressure-magnetic field phase diagram of ${CeTiGe}_{3}$
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DOI: 10.1103/physrevb.97.045139

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Title: Kondo lattice and antiferromagnetic behavior in quaternary CeTAl4Si2 (T = Rh, Ir) single crystals

Abstract

Citation Formats

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