Element and orbital-specific observation of two-step magnetic transition in NpNiGa5: X-ray magnetic circular dichroism study

T. Okane, T. Ohkochi, T. Inami, Y. Takeda, S. I. Fujimori, N. Kawamura, M. Suzuki, S. Tsutsui, H. Yamagami, A. Fujimori, A. Tanaka, D. Aoki, Y. Homma, Y. Shiokawa, E. Yamamoto, Y. Haga, A. Nakamura, Y. Onuki

研究成果: Article査読

8 被引用数 (Scopus)

抄録

X-ray magnetic circular dichroism (XMCD) experiments were performed at the Np M4,5 and the GaK absorption edges of NpNiGa5 to investigate the temperature-dependent changes of magnetic properties of Np5f and Ga4p electron states. By the sum-rule analysis of the Np M4,5 XMCD data, the orbital magnetic moment μL and the spin magnetic moment μS were estimated for the Np5 f3 and 5 f4 electronic configurations and their comparison to the previous magnetization and neutron-scattering experiments suggests that the 5 f4 configuration is more likely than the 5 f3 configuration in NpNiGa5. It was found that μL μS tends to increase from the high-temperature low-moment ordered state to the low-temperature high-moment ordered state. The result of the GaK XMCD indicates that the Ga4p electrons are magnetically polarized and the temperature and magnetic-field dependences of the Ga4p orbital moment are proportional to those of the magnetization measurements.

本文言語English
論文番号104419
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
80
10
DOI
出版ステータスPublished - 2009 9月 16

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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