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and NpCoGaDetlefs, B.*; Wilkins, S. B.*; Caciuffo, R.*; Paix
o, J. A.*; Kaneko, Koji; Honda, Fuminori*; Metoki, Naoto; Bernhoeft, N.*; Rebizant, J.*; Lander, G. H.*
Physical Review B, 77(2), p.024425_1 - 024425_10, 2008/01
Times Cited Count：17 Percentile：57.23(Materials Science, Multidisciplinary)We report a resonant X-ray scattering study of the antiferromagnetic neptunium compounds NpCoGa and NpRhGa. Large resonant signals of magnetic dipole character are observed below the N
el temperatures. The signals at the Np edges confirm the behavior determined previously from neutron diffraction. On application of a magnetic field of 9 T along the [010] direction in NpRhGa, we observe a change in the population of different [110]-type domains. We also observe a magnetic dipole signal at the Ga 
edge, similarly to the reported UGa
case, that can be interpreted within a semilocalized model as an orbital polarization of the Ga 4
states induced via strong hybridization with the Np 5
valence band. Quantitative analysis of the signal shows that the Ga dipole on the two different Ga sites follows closely the Np magnetic moment reorientation in NpRhGa. The ratios of the signals on the two inequivalent Ga sites are not the same for the different compounds.
by phonon spectroscopyRaymond, S.*; Piekarz, P.*; Sanchez, J. P.*; Serrano, J.*; Kirsch, M.*; Detlefs, B.*; Rebizant, J.*; Metoki, Naoto; Kaneko, Koji; Jochym, P. T.*; et al.
Journal of Alloys and Compounds, 444-445, p.104 - 108, 2007/10
Times Cited Count：2 Percentile：20.92(Chemistry, Physical)The phonon dispersion curves of the unconventional superconductor PuCoGa were studied by inelastic X-ray scattering at room temperature. The experimental data agree well with ab initio lattice dynamics calculations. An accurate theoretical description of the phonon spectrum is obtained only when a local Coulomb repulsion 
3 eV among 5f electrons is taken into account. This implies partial localization of the 5f electrons in this compound. A comparison made with the phonon spectrum of UCoGa suggests that the latter compound is better described with a fully itinerant f electrons model.
by phonon spectroscopyRaymond, S.*; Piekarz, P.*; Sanchez, J. P.*; Serrano, J.*; Kirsch, M.*; Janousova, B.*; Rebizant, J.*; Metoki, Naoto; Kaneko, Koji; Jochym, P. T.*; et al.
Physical Review Letters, 96(23), p.237003_1 - 237003_4, 2006/06
Times Cited Count：26 Percentile：74.02(Physics, Multidisciplinary)The phonon dispersion curves of the superconductor PuCoGa
were studied by inelastic X-ray scattering at room temperature. The experimental data agree well with 
lattice dynamics calculations. An accurate description of the phonon spectrum is obtained only when a local Coulomb repulsion U
3 eV among 5 electrons is taken into account.
Metoki, Naoto; Kaneko, Koji; Colineau, E.*; Javorsk
, P.*; Aoki, Dai*; Homma, Yoshiya*; Boulet, P.*; Wastin, F.*; Shiokawa, Yoshinobu; Bernhoeft, N.*; et al.
Physical Review B, 72(1), p.014460_1 - 014460_8, 2005/07
Times Cited Count：50 Percentile：83.11(Materials Science, Multidisciplinary)no abstracts in English
(A:U, Pu)Metoki, Naoto; Kaneko, Koji; Ikeda, Shugo; Matsuda, Tatsuma; Haga, Yoshinori; Onuki, Yoshichika; Raymond, S.*; Piekarz, P.*; Sanchez, J. P.*; Serrano, J.*; et al.
no journal, ,
no abstracts in English
