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Journal Articles

Resonant magnetic X-ray scattering study of UPd$$_2$$Al$$_3$$

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

UPd$$_2$$Al$$_3$$ is an attractive material because of the coexistence of the antiferromagnetic order below $$T_N$$ = 14.5 K and superconductivity below $$T_c$$ = 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 $$T_c$$. Therefore we performed RMXS study from U $$M_1$$ to $$M_4$$ edge at $$T_c < T < T_N$$. In addition to a huge resonance at $$M_4$$-edge, we observed a resonant feature at $$M_2$$-edge which corresponds to the transition from $$3p_{1/2}$$ to $$6d$$ orbitals, while resonance at $$M_1$$-edge and $$M_3$$-edge is rather small.

Journal Articles

Resonant X-ray scattering study of UNiGa$$_5$$

Kuzushita, Kaori; Ishii, Kenji; Owada, Kenji; Murakami, Yoichi; Kaneko, Koji; Metoki, Naoto; Lander, G. H.; Ikeda, Shugo; Haga, Yoshinori; Onuki, Yoshichika

Physica B; Condensed Matter, 359-361, p.1045 - 1047, 2005/04

https://doi.org/10.1016/j.physb.2005.01.419
 Times Cited Count：2 Percentile：11.64(Physics, Condensed Matter)

In UNiGa$$_5$$ which shows antiferromagnetic ordering below $textit{T$_N$}$ = 86 K with 0.75 $$mu_B$$/U, we observed resonant magnetic reflections using synchrotron X-ray tuned the incident photon energy near M$$_4$$-edge of U and K-edge of Ga, and the large enhancement about 10$$^2$$ at just resonant energy of Ga K-edge although Ga is a nonmagnetic element. It is considered that the origin of the magnetic resonant scattering intensity at Ga K-edge is the Ga-4$textit{p}$ orbital polarization induced by the 5$textit{f}$ orbital polarization at the neighboring U atom due to the hybridization.

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