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2015 | 127 | 2 | 237-239
Article title

Magnetic and Thermodynamic Properties of Ce₄RuAl

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EN
Abstracts
EN
The results of magnetic susceptibility and heat capacity measurements are reported for the Ce₄RuAl compound above room temperature to low temperature range (400 K to 0.34 K) and in the magnetic field up to 7 T. The magnetic susceptibility χ(T) exhibits a distinct anomaly at 0.95 K which most probably suggests a paramagnetic to antiferromagnetic phase transition. The magnetic susceptibility obeys the Curie-Weiss law in the region 100-400 K and revealed an effective magnetic moment μ_{eff}=2.18 μ_{B}/Ce which is less than the value for free Ce³⁺ (μ_{eff}=2.54 μ_{B}). The paramagnetic Weiss temperature indicates net antiferromagnetic correlations. In the specific heat a peak at 1.3 K supports the bulk nature of the phase transition observed in χ(T). The Sommerfield coefficient is moderately enhanced in the paramagnetic phase, and suggests f-c correlations among the electrons prior to magnetic ordering. The obtained Sommerfield coefficient γ behavior is consistent with the Anderson model-based theoretical predictions.
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Contributors
author
  • Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, PO Box 524, Auckland Park 2006, South Africa
author
  • Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, PO Box 524, Auckland Park 2006, South Africa
author
  • Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, PO Box 524, Auckland Park 2006, South Africa
author
  • Institut für Anorganische und Analytische Chemie, Universität Münster, Germany
author
  • Institut für Anorganische und Analytische Chemie, Universität Münster, Germany
References
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Document Type
Publication order reference
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bwmeta1.element.bwnjournal-article-appv127n2022kz
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