|
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 |
|
| 言語種別 | 英語 |
| 発行・発表の年月 | 2010/02 |
| 形態種別 | その他 |
| 標題 | Electronic structure and magnetism of the diluted magnetic semiconductor Fe-doped ZnO nanoparticles |
| 執筆形態 | その他 |
| 掲載誌名 | JOURNAL OF APPLIED PHYSICS |
| 出版社・発行元 | AMER INST PHYSICS |
| 巻・号・頁 | 107(3),pp.033718\_1-033718\_7 |
| 著者・共著者 | T. Kataoka,M. Kobayashi,Y. Sakamoto,G. S. Song,A. Fujimori,F. -H. Chang,H. -J. Lin,D. J. Huang,C. T. Chen,T. Ohkochi,Y. Takeda,T. Okane,Y. Saitoh,H. Yamagami,A. Tanaka,S. K. Mandal,T. K. Nath,D. Karmakar,I. Dasgupta |
| 概要 | We have studied the electronic structure of Fe-doped ZnO nanoparticles, which have been reported to show ferromagnetism at room temperature, by x-ray photoemission spectroscopy, resonant photoemission spectroscopy, x-ray absorption spectroscopy, and x-ray magnetic circular dichroism (XMCD). From the experimental and cluster-model calculation results, we find that Fe atoms are predominantly in the Fe(3+) ionic state with mixture of a small amount of Fe(2+) and that Fe(3+) ions are dominant in the surface region of the nanoparticles. It is shown that the room temperature ferromagnetism in the Fe-doped ZnO nanoparticles primarily originated from the antiferromagnetic coupling between unequal amounts of Fe(3+) ions occupying two sets of nonequivalent positions in the region of the XMCD probing depth of similar to 2-3 nm. |
| DOI | 10.1063/1.3294620 |
| ISSN | 0021-8979 |
| NAID | 120005667619 |