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Ishii, Kenji; Kuzushita, Kaori; Murakami, Yoichi; Haga, Yoshinori; Yamamoto, Etsuji; Onuki, Yoshichika
Journal of the Physical Society of Japan, 75(Suppl.), p.102 - 104, 2006/08
UPdAl
is an attractive material because of the coexistence of the antiferromagnetic order below
= 14.5 K and superconductivity below
= 2 K. In order to discuss the coupling between magnetism and superconductivity by resonant magnetic X-ray scattering (RMXS), nature of the resonance at each absorption edge should be clarified before the measurements across
. Therefore we performed RMXS study from U
to
edge at
. In addition to a huge resonance at
-edge, we observed a resonant feature at
-edge which corresponds to the transition from
to
orbitals, while resonance at
-edge and
-edge is rather small.
Fujimori, Shinichi; Terai, Kota; Takeda, Yukiharu; Okane, Tetsuo; Saito, Yuji; Kobayashi, Keisuke; Fujimori, Atsushi; Yamagami, Hiroshi*; Ikeda, Shugo; Matsuda, Tatsuma; et al.
Journal of the Physical Society of Japan, 75(Suppl.), p.99 - 101, 2006/08
Times Cited Count:0 Percentile:0.00(Physics, Multidisciplinary)In the present study, we have performed SX-ARPES experiments on some heavy Fermion (HF) uranium compounds such as UPdAl
using soft X-ray synchrotron radiation from BL23SU of SPring-8. UPd
Al
is an HF uranium compound which has transitions into an antiferromagnetic phase at
K and into a superconducting phase at
=2 K. To describe the various properties of this compound, the dual model for U 5
states is proposed. In this model, two of the three U 5f states are in a localized state while the third electron has delocalized character. We have obtained U 5f sensitive band structure of UPd
Al
by SX-ARPES, and the results are compared with this scenario. Temperature dependence of the U 5
electronic structure in this compound is also discussed.