Magnetic structure of the antiferromagnetic Kondo lattice compounds CeRhAl4Si2 and CeIrAl4Si2

Ghimire, N. J.; Calder, S.; Janoschek, M.; Bauer, E. D.

doi:10.1088/0953-8984/27/24/245603

Title: Magnetic structure of the antiferromagnetic Kondo lattice compounds CeRhAl₄Si₂ and CeIrAl₄Si₂

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Abstract

Here, we have investigated the magnetic ground state of the antiferromagnetic Kondo- lattice compounds CeMAl₄Si₂ (M = Rh, Ir) using neutron powder diffraction. Although both of these compounds show two magnetic transitions T_N1 and T_N2 in the bulk properties measurements, evidence for magnetic long-range order was only found below the lower transition T_N2. Analysis of the diffraction profiles reveals a commensurate antiferromagnetic structure with a propagation vector k= (0, 0, 1/2). The magnetic moment in the ordered state of CeRhAl₄Si₂ and CeIrAl₄Si₂ were determined to be 1.14(2) and 1.41(3) μ_B/Ce^–1, respectively, and are parallel to the crystallographic c direction in agreement with magnetic susceptibility measurements.

Authors:

Ghimire, N. J. ^[1]; Calder, S. ^[2]; Janoschek, M. ^[1]; Bauer, E. D. ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Mon Jun 01 00:00:00 EDT 2015

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1233542

Alternate Identifier(s):: OSTI ID: 1338485

Report Number(s):: LA-UR-15-21987
Journal ID: ISSN 0953-8984

Grant/Contract Number:: AC52-06NA25396; AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Physics. Condensed Matter

Additional Journal Information:: Journal Volume: 27; Journal Issue: 24; Journal ID: ISSN 0953-8984

Publisher:: IOP Publishing

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Kondo lattice compounds; neutron diffraction; magnetic structure

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                    Ghimire, N. J., Calder, S., Janoschek, M., and Bauer, E. D. Magnetic structure of the antiferromagnetic Kondo lattice compounds CeRhAl4Si2 and CeIrAl4Si2.  United States: N. p., 2015. 
Web.  doi:10.1088/0953-8984/27/24/245603.

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                    Ghimire, N. J., Calder, S., Janoschek, M., & Bauer, E. D. Magnetic structure of the antiferromagnetic Kondo lattice compounds CeRhAl4Si2 and CeIrAl4Si2.  United States.  https://doi.org/10.1088/0953-8984/27/24/245603

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                    Ghimire, N. J., Calder, S., Janoschek, M., and Bauer, E. D. Mon .  
"Magnetic structure of the antiferromagnetic Kondo lattice compounds CeRhAl4Si2 and CeIrAl4Si2".  United States.  https://doi.org/10.1088/0953-8984/27/24/245603.  https://www.osti.gov/servlets/purl/1233542.

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@article{osti_1233542,

  title        = {Magnetic structure of the antiferromagnetic Kondo lattice compounds CeRhAl4Si2 and CeIrAl4Si2},

  author       = {Ghimire, N. J. and Calder, S. and Janoschek, M. and Bauer, E. D.},

  abstractNote = {Here, we have investigated the magnetic ground state of the antiferromagnetic Kondo- lattice compounds CeMAl4Si2 (M = Rh, Ir) using neutron powder diffraction. Although both of these compounds show two magnetic transitions TN1 and TN2 in the bulk properties measurements, evidence for magnetic long-range order was only found below the lower transition TN2. Analysis of the diffraction profiles reveals a commensurate antiferromagnetic structure with a propagation vector k= (0, 0, 1/2). The magnetic moment in the ordered state of CeRhAl4Si2 and CeIrAl4Si2 were determined to be 1.14(2) and 1.41(3) μB/Ce–1, respectively, and are parallel to the crystallographic c direction in agreement with magnetic susceptibility measurements.},

  doi          = {10.1088/0953-8984/27/24/245603},

  journal      = {Journal of Physics. Condensed Matter},

  number       = 24,

  volume       = 27,

  place        = {United States},

  year         = {Mon Jun 01 00:00:00 EDT 2015},

  month        = {Mon Jun 01 00:00:00 EDT 2015}

}

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Title: Magnetic structure of the antiferromagnetic Kondo lattice compounds CeRhAl4Si2 and CeIrAl4Si2

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Title: Magnetic structure of the antiferromagnetic Kondo lattice compounds CeRhAl₄Si₂ and CeIrAl₄Si₂