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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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| 発行・発表の年月 | 2010/12/24 |
| 形態種別 | その他 |
| 査読 | 査読あり |
| 標題 | Electronic structure of La(Fe0.88Si0.12)13 |
| 執筆形態 | その他 |
| 掲載誌名 | Materials Research Society Symposium Proceedings |
| 巻・号・頁 | 1262,109-114頁 |
| 著者・共著者 | Nozomu Kamakura,Tetsuo Okane,Yukiharu Takeda,Shin Ichi Fujimori,Yuji Saitoh,Hiroshi Yamagami,Atsushi Fujimori,Asaya Fujita,Shun Fujieda,Kazuaki Fukamichi |
| 概要 | La(Fe0.88Si0.12)13 shows peculiar magnetic properties such as the first order paramagnetic-ferromagnetic transition and magnetic-field induced metamagnetic transition accompanied by the lattice expansion. The practical application using the magnetic transition temperature controlled by hydrogen absorption is expected in this compound. Here, the electronic structure of La(Fe0.88Si0.12)13 has been investigated by photoemission spectroscopy using synchrotron soft x-rays. The Fe 3s core-level photoemission spectra below and above the Curie temperature TC exhibit a satellite structure at ∼ 4.3 eV higher binding energy than the main peak, which is attributed to the exchange splitting due to the local moment of Fe. The exchange splitting of the Fe 3s photoemission spectrum with the asymmetric line shape shows that the magnetization of La(Fe0.88Si0.12)13 is derived by the exchange split Fe 3d bands like the itinerant ferromagnetism in Fe metal, while the magnetic transition of La(Fe0.88Si0.12)13 is the first order. The valence band photoemission spectrum shows temperature dependence across the TC. The temperature dependence of the photoemission spectra is discussed based on the difference between the electronic structure in the ferromagnetic phase and that in the paramagnetic phase. © 2010 Materials Research Society. |
| ISSN | 0272-9172 |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=78650342794&origin=inward |