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Elastic constants and quadrupolar interactions in the (LaCe)B6 series

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Zeitschrift für Physik B Condensed Matter

Abstract

Elastic constants of (La1−xCex)B6(x=0.01, 0.03, 0.1) dilute alloys have been determined by ultrasonic measurements at temperatures between 0.5 K and 4.2 K. The temperature dependence ofc 44 and (c 11−c 12)/2 is in excellent agreement with calculations including magnetoelastic and interionic quadrupolar interactions. The single ion coupling constantsg Γ(Γ=Γ3, Γ3) are independent of concentration. The systematic concentration dependence of quadrupolar coupling constants g'gΓ(x) from the dilute (x=0.01) alloy to the compound CeB6 (x=1) has been studied. Evidence of Grüneisenparameter coupling in the bulk modulus but no indication for a Γ8 ground state splitting or a quadrupolar Kondo effect has been found. In addition the magnetic field dependence of elastic constants up to 6.5 Tesla was investigated.

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Authors and Affiliations

  1. 2. Physikalisches Institut, Rhein.-Westf. Techn. Hochschule Aachen, Templergraben 55, D-5100, Aachen, Germany

    P. Lemmens & S. Ewert

  2. 2. Physikalisches Institut, Universität Frankfurt, Robert-Mayer-Strasse 2, D-6000, Frankfurt am Main 11, Germany

    P. Thalmeier

  3. Institut für Allgemeine Metallkunde und Metallphysik, Rhein.-Westf. Techn. Hochschule Aachen, D-5100, Aachen, Germany

    D. Lenz

  4. 1. Physikalisches Institut, Universität Göttingen, Bunsenstrasse 9, D-3400, Göttingen, Germany

    K. Winzer

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  1. P. Lemmens
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  2. S. Ewert
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  3. P. Thalmeier
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  4. D. Lenz
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  5. K. Winzer
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Lemmens, P., Ewert, S., Thalmeier, P. et al. Elastic constants and quadrupolar interactions in the (LaCe)B6 series. Z. Physik B - Condensed Matter 76, 501–506 (1989). https://doi.org/10.1007/BF01307901

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  • DOI: https://doi.org/10.1007/BF01307901

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