Title: Magnetic Excitations in NpCoGa5 - Inelastic Neutron Scattering Experiments
Authors: MAGNANI NicolaHIESS A.CACIUFFO ROBERTOCOLINEAU ERICWASTIN FRANCKREBIZANT JEANLANDER G.h.
Citation: PHYSICAL REVIEW B vol. 76 p. 100404
Publisher: AMERICAN PHYSICAL SOC
Publication Year: 2007
JRC N°: JRC40851
ISSN: 1098-0121
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC40851
DOI: 10.1103/PhysRevB.76.100404
Type: Articles in Journals
Abstract: We report the results of inelastic neutron scattering experiments on NpCoGa5, an isostructural analog of the PuCoGa5 superconductor. Two energy scales characterize the magnetic response in the antiferromagnetic phase. One is related to a nondispersive excitation between two crystal field levels. The other at lower energies corresponds to dispersive fluctuations emanating from the magnetic zone center. The fluctuations persist in the paramagnetic phase also, although weaker in intensity. This supports the possibility that magnetic fluctuations are present in PuCoGa5, where unconventional d-wave superconductivity is achieved in the absence of magnetic order.
JRC Institute:Institute for Transuranium Elements

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