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Neutron inelastic scattering experiments were performed with triple axis spectrometers at the Institut Laue-Langevin, Grenoble, on a single domain (field-cooled) crystal of the actinide ferromagnet UTe (T(c) = 104K). The excitation at the zone centre has an anisotropy gap of 3.6 THz. In the direction of the easy axis, it is possible to follow the excitation to the zone boundary, where the frequency is approximately 9 THz. In the perpendicular direction the excitation rapidly becomes strongly damped. The excitation is also broader than the resolution function throughout the zone. The instrumental Gaussian resolution function was convoluted with a Lorentzian function to obtain this broadening quantitatively. A further broad continuum of magnetic scattering is also identified at low temperature; this contribution increases rapidly as the temperature is raised. The measurements suggest that the 5f electrons in UTe strongly hybridise with the conduction electrons.

Additional information

Authors: LANDER G H, JRC Karlsruhe (DE);STIRLING W G, University of Keele, Department of Physics, Keele (GB);HAGEN M, University of Keele, Department of Physics, Keele (GB);ROSSAT-MIGNOD J M, CEN, Département de Recherche Fondamentale, Grenoble (FR);VOGT O, Eidgenossische Technische Hochschule, Laboratorium für Festkörperphysik, Zürich (CH)
Bibliographic Reference: Article: Physical Review B, Vol. 41 (1990) No. 10, pp. 6899-6906
Record Number: 199011868 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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