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ヤマガミ ヒロシ
YAMAGAMI HIROSHI
山上 浩志 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2009/09 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Element and orbital-specific observation of two-step magnetic transition in NpNiGa5: X-ray magnetic circular dichroism study |
| 執筆形態 | その他 |
| 掲載誌名 | PHYSICAL REVIEW B |
| 出版社・発行元 | AMER PHYSICAL SOC |
| 巻・号・頁 | 80(10) |
| 著者・共著者 | 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 |
| 概要 | X-ray magnetic circular dichroism (XMCD) experiments were performed at the Np M-4,M-5 and the Ga K absorption edges of NpNiGa5 to investigate the temperature-dependent changes of magnetic properties of Np 5f and Ga 4p electron states. By the sum-rule analysis of the Np M-4,M-5 XMCD data, the orbital magnetic moment mu(L) and the spin magnetic moment mu(S) were estimated for the Np 5f(3) and 5f(4) electronic configurations and their comparison to the previous magnetization and neutron-scattering experiments suggests that the 5f(4) configuration is more likely than the 5f(3) configuration in NpNiGa5. It was found that vertical bar mu(L)/mu(S)vertical bar tends to increase from the high-temperature low-moment ordered state to the low-temperature high-moment ordered state. The result of the Ga K XMCD indicates that the Ga 4p electrons are magnetically polarized and the temperature and magnetic-field dependences of the Ga 4p orbital moment are proportional to those of the magnetization measurements. |
| DOI | 10.1103/PhysRevB.80.104419 |
| ISSN | 1098-0121 |