Magnetic-field tuning of quantum critical fluctuations in CeCu5.9Au0.1

A. Schröder, G. Aeppli, D.F. McMorrow, E. Bucher

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The magnetic field dependence of the quantum critical fluctuations close to the antiferromagnetic transition in CeCu5.9Au0.1 is investigated directly by neutron scattering at TAS7 in Riso in a horizontal magnet. The butterfly-shaped critical wave vector region in the a*c*-plane persists up to H = 1.8 T (Hparallel toc) and the magnetic spectrum can be represented by the same function used for 0 T, including the unusual exponent alpha = 0.75. The field only changes the dynamics like an effective temperature T-eff = (T-2 + (muH/k(B))(2))(0.5) with a moment mu = 1.3mu(beta). This result is entirely consistent with and complements the 0 T neutron scattering and the uniform magnetization data, which are successfully described by E/T and H/T scaling properties, respectively, establishing the unusual non-Fermi-liquid behavior in this heavy fermion compound. (C) 2002 Elsevier Science B.V. All rights reserved.
    Original languageEnglish
    JournalPhysica B: Condensed Matter
    Volume312-313
    Pages (from-to)456-457
    ISSN0921-4526
    DOIs
    Publication statusPublished - 2002

    Cite this

    Schröder, A. ; Aeppli, G. ; McMorrow, D.F. ; Bucher, E. / Magnetic-field tuning of quantum critical fluctuations in CeCu5.9Au0.1. In: Physica B: Condensed Matter. 2002 ; Vol. 312-313. pp. 456-457.
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    title = "Magnetic-field tuning of quantum critical fluctuations in CeCu5.9Au0.1",
    abstract = "The magnetic field dependence of the quantum critical fluctuations close to the antiferromagnetic transition in CeCu5.9Au0.1 is investigated directly by neutron scattering at TAS7 in Riso in a horizontal magnet. The butterfly-shaped critical wave vector region in the a*c*-plane persists up to H = 1.8 T (Hparallel toc) and the magnetic spectrum can be represented by the same function used for 0 T, including the unusual exponent alpha = 0.75. The field only changes the dynamics like an effective temperature T-eff = (T-2 + (muH/k(B))(2))(0.5) with a moment mu = 1.3mu(beta). This result is entirely consistent with and complements the 0 T neutron scattering and the uniform magnetization data, which are successfully described by E/T and H/T scaling properties, respectively, establishing the unusual non-Fermi-liquid behavior in this heavy fermion compound. (C) 2002 Elsevier Science B.V. All rights reserved.",
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    Magnetic-field tuning of quantum critical fluctuations in CeCu5.9Au0.1. / Schröder, A.; Aeppli, G.; McMorrow, D.F.; Bucher, E.

    In: Physica B: Condensed Matter, Vol. 312-313, 2002, p. 456-457.

    Research output: Contribution to journalJournal articleResearchpeer-review

    TY - JOUR

    T1 - Magnetic-field tuning of quantum critical fluctuations in CeCu5.9Au0.1

    AU - Schröder, A.

    AU - Aeppli, G.

    AU - McMorrow, D.F.

    AU - Bucher, E.

    PY - 2002

    Y1 - 2002

    N2 - The magnetic field dependence of the quantum critical fluctuations close to the antiferromagnetic transition in CeCu5.9Au0.1 is investigated directly by neutron scattering at TAS7 in Riso in a horizontal magnet. The butterfly-shaped critical wave vector region in the a*c*-plane persists up to H = 1.8 T (Hparallel toc) and the magnetic spectrum can be represented by the same function used for 0 T, including the unusual exponent alpha = 0.75. The field only changes the dynamics like an effective temperature T-eff = (T-2 + (muH/k(B))(2))(0.5) with a moment mu = 1.3mu(beta). This result is entirely consistent with and complements the 0 T neutron scattering and the uniform magnetization data, which are successfully described by E/T and H/T scaling properties, respectively, establishing the unusual non-Fermi-liquid behavior in this heavy fermion compound. (C) 2002 Elsevier Science B.V. All rights reserved.

    AB - The magnetic field dependence of the quantum critical fluctuations close to the antiferromagnetic transition in CeCu5.9Au0.1 is investigated directly by neutron scattering at TAS7 in Riso in a horizontal magnet. The butterfly-shaped critical wave vector region in the a*c*-plane persists up to H = 1.8 T (Hparallel toc) and the magnetic spectrum can be represented by the same function used for 0 T, including the unusual exponent alpha = 0.75. The field only changes the dynamics like an effective temperature T-eff = (T-2 + (muH/k(B))(2))(0.5) with a moment mu = 1.3mu(beta). This result is entirely consistent with and complements the 0 T neutron scattering and the uniform magnetization data, which are successfully described by E/T and H/T scaling properties, respectively, establishing the unusual non-Fermi-liquid behavior in this heavy fermion compound. (C) 2002 Elsevier Science B.V. All rights reserved.

    KW - 2-E tekno

    U2 - 10.1016/S0921-4526(01)01325-4

    DO - 10.1016/S0921-4526(01)01325-4

    M3 - Journal article

    VL - 312-313

    SP - 456

    EP - 457

    JO - Physica B: Condensed Matter

    JF - Physica B: Condensed Matter

    SN - 0921-4526

    ER -