Magnetic state in URu2Si2, UPd2Al3, and UNi2Al3 probed by point contacts

Электpонные свойства металлов и сплавов

Автор(и)

  • Yu. G. Naidyuk Grenoble High Magnetic Field Laboratory, Max-Planck-Institut für Festkörperforschung and Centre National de la Recherche Scientifique, Grenoble Cedex 9, F-38042, France
  • O. E. Kvitnitskaya Grenoble High Magnetic Field Laboratory, Max-Planck-Institut für Festkörperforschung and Centre National de la Recherche Scientifique, Grenoble Cedex 9, F-38042, France
  • A. G. M. Jansen Grenoble High Magnetic Field Laboratory, Max-Planck-Institut für Festkörperforschung and Centre National de la Recherche Scientifique, Grenoble Cedex 9, F-38042, France
  • P. Wyder Grenoble High Magnetic Field Laboratory, Max-Planck-Institut für Festkörperforschung and Centre National de la Recherche Scientifique, Grenoble Cedex 9, F-38042, France
  • C. Geibel Max-Planck Institut für Chemische Physik Fester Stoffe, Dresden, D-01187, Germany
  • A. A. Menovsky Van der Waals-Zeeman Laboratory, University of Amsterdam 1018 XE, The Netherlands

DOI:

https://doi.org/10.1063/1.1382993

Ключові слова:

PACS: 71.28. d, 73.40.Jn, 75.30.-m

Анотація

The antiferromagnetic (AFM) state has been investigated in the three heavy-fermion compounds URu2Si2,UPd2Al3, and UNi2Al3 by measuring dV/dI(V) curves of point contacts at different temperatures 1.5-20 K and magnetic fields 0-28 T. The zero-bias maximum in dV/dI(V) for URu2Si2 points to a partially gapped Fermi surface related to the itinerant nature of the AFM state, contrary to the case of UPd2Al3, where analogous features have not been found. The AFM state in UNi2Al3 has more similarities with URu2Si2. For URu2Si2, the same critical field of about 40 T along the easy axis c is found for all features in dV/dI(V), corresponding to the Néel temperature, the gap in the electronic density of states, and presumably the ordered moments.

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Опубліковано

2001-06-10

Як цитувати

(1)
Naidyuk, Y. G.; Kvitnitskaya, O. E.; Jansen, A. G. M.; Wyder, P.; Geibel, C.; Menovsky, A. A. Magnetic State in URu2Si2, UPd2Al3, and UNi2Al3 Probed by Point Contacts: Электpонные свойства металлов и сплавов. Fiz. Nizk. Temp. 2001, 27, 668-673.

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