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Neutron diffraction study of the heavy fermion superconductors UM2Al3(M=Pd, Ni)

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Zeitschrift für Physik B Condensed Matter

Abstract

An elastic neutron scattering study was performed on the new superconducting heavy fermion systems UPd2Al3 and UNi2Al3. The neutron diffraction patterns reveal unambiguously long range antiferromagnetic order in UPd2Al3 with an ordered magnetic momentμ U = (0.85±0.03)μ B , which coexists with the superconducting state. This is by far the largestμ U value observed for any heavy fermion superconductor. For UNi2Al3, no long-range magnetic order could be observed for temperaturesT≧1.5 K, yielding an upper limit of the ordered moment of 0.2μ B .

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Authors and Affiliations

  1. Institut Laue Langevin, F-38042, Grenoble, France

    A. Krimmel

  2. Labor für Neutronenstreuung, ETH Zürich, PSI, CH-5232, Villigen, Switzerland

    P. Fischer & B. Roessli

  3. Hahn-Meitner Institut, W-1000, Berlin, Federal Republic of Germany

    H. Maletta

  4. Institut für Festkörperphysik, TH Darmstadt, W-6100, Darmstadt, Federal Republic of Germany

    C. Geibel, C. Schank, A. Grauel & A. Loidl

  5. Institut für Physik, Universität Mainz, W-6500, Mainz, Federal Republic of Germany

    A. Krimmel, A. Loidl & F. Steglich

Authors
  1. A. Krimmel
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  2. P. Fischer
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  3. B. Roessli
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  4. H. Maletta
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  5. C. Geibel
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  6. C. Schank
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  7. A. Grauel
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  8. A. Loidl
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  9. F. Steglich
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Krimmel, A., Fischer, P., Roessli, B. et al. Neutron diffraction study of the heavy fermion superconductors UM2Al3(M=Pd, Ni). Z. Physik B - Condensed Matter 86, 161–162 (1992). https://doi.org/10.1007/BF01313821

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  • DOI: https://doi.org/10.1007/BF01313821

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