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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 | 2008/10 |
| 形態種別 | 研究論文 |
| 標題 | Systematic changes of the electronic structure of the diluted ferromagnetic oxide Li-doped Ni(1-x)Fe(x)O with hole doping |
| 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 | 78(15) |
| 著者・共著者 | M. Kobayashi,J. I. Hwang,G. S. Song,Y. Ooki,M. Takizawa,A. Fujimori,Y. Takeda,S. -I. Fujimori,K. Terai,T. Okane,Y. Saitoh,H. Yamagami,Y. -H. Lin,C. -W. Nan |
| 概要 | The electronic structure of Li-doped Ni(1-x)Fe(x)O has been investigated using photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS). The Ni 2p core-level PES and XAS spectra were not changed by Li doping. In contrast, the Fe(3+) intensity increased with Li doping relative to the Fe(2+) intensity. However, the increase in Fe(3+) is only similar to 5% of the doped Li content, suggesting that most of the doped holes enter the O 2p and/or the charge-transferred configuration Ni 3d(8)L_. The Fe 3d partial density of states and the host valence-band emission near the valence-band maximum increased with Li content, consistent with the increase in electrical conductivity. Based on these findings, percolation of bound magnetic polarons is proposed as an origin of the ferromagnetic behavior. |
| DOI | 10.1103/PhysRevB.78.155322 |
| ISSN | 1098-0121 |