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.
机构:
Advanced Science and Res. Center, Japan Atomic Energy Research Inst., Tokai, Ibaraki 319-1195, JapanAdvanced Science and Res. Center, Japan Atomic Energy Research Inst., Tokai, Ibaraki 319-1195, Japan
Maehira, Takahiro
Hotta, Takashi
论文数: 0引用数: 0
h-index: 0
机构:
Advanced Science and Res. Center, Japan Atomic Energy Research Inst., Tokai, Ibaraki 319-1195, JapanAdvanced Science and Res. Center, Japan Atomic Energy Research Inst., Tokai, Ibaraki 319-1195, Japan
Hotta, Takashi
Ueda, Kazuo
论文数: 0引用数: 0
h-index: 0
机构:
Advanced Science and Res. Center, Japan Atomic Energy Research Inst., Tokai, Ibaraki 319-1195, Japan
Inst. for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, JapanAdvanced Science and Res. Center, Japan Atomic Energy Research Inst., Tokai, Ibaraki 319-1195, Japan
Ueda, Kazuo
Hasegawa, Akira
论文数: 0引用数: 0
h-index: 0
机构:
Niigata University, Niigata, Niigata 950-2181, JapanAdvanced Science and Res. Center, Japan Atomic Energy Research Inst., Tokai, Ibaraki 319-1195, Japan