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A polarised neutron scattering study of magnetic fluctuations in the heavy fermion superconductor CeCu2Si2

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Zeitschrift für Physik B Condensed Matter

Abstract

Magnetic fluctuations in CeCu2Si2 were directly observed, both above the superconducting transition temperatureT C as well as below. Spatial correlations of the magnetisation density belowT C are weak, resulting in an essentially wavevector independent magnetic response. The intensity observed within an energy window of ±5 THz centred on ω=0 THz corresponds to 1µ β per Ce atom. Higher energy excitations peaking between 7–10 THz were observed and are probably due to higher crystal field levels.

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Authors and Affiliations

  1. Institut Laue-Langevin, B.P. 156, F-38042, Grenoble, France

    S. M. Johnson, J. A. C. Bland, P. J. Brown & K. R. A. Ziebeck

  2. Centre de Recherches sur les Très Basses Températures, CNRS, F-38042, Grenoble, France

    A. Benoit & J. Flouquet

  3. Institut für Theoretische Physik, Rhein.-Westfälische Technische Hochschule Aachen Erweiterungsgelände Seffent-Melaten, D-5100, Aachen, Germany

    H. Capellmann

  4. Institut für Festkörperphysik, Technische Hochschule Darmstadt, D-6100, Darmstadt, Germany

    H. Spille & F. Steglich

Authors
  1. S. M. Johnson
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  2. J. A. C. Bland
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  3. P. J. Brown
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  4. A. Benoit
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  5. H. Capellmann
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  6. J. Flouquet
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  7. H. Spille
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  8. F. Steglich
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  9. K. R. A. Ziebeck
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Johnson, S.M., Bland, J.A.C., Brown, P.J. et al. A polarised neutron scattering study of magnetic fluctuations in the heavy fermion superconductor CeCu2Si2 . Z. Physik B - Condensed Matter 59, 401–406 (1985). https://doi.org/10.1007/BF01328848

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  • DOI: https://doi.org/10.1007/BF01328848

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