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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 | 2000/08 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Magnetic and Fermi surface properties of the ferromagnetic compound UGa2 |
| 執筆形態 | その他 |
| 掲載誌名 | JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN |
| 出版社・発行元 | PHYSICAL SOC JAPAN |
| 巻・号・頁 | 69(8),pp.2647-2659 |
| 著者・共著者 | T Honma,Y Inada,R Settai,S Araki,Y Tokiwa,T Takeuchi,H Sugawara,H Sato,K Kuwahara,M Yokoyama,H Amitsuka,T Sakakibara,E Yamamoto,Y Haga,A Nakamura,H Harima,H Yamagami,Y Onuki |
| 概要 | We have studied the magnetic and Fermi surface properties in a ferromagnet UGa2. The electrical resistivity, elastic constant, thermal expansion coefficient: thermoelectric power, magnetic susceptibility and Hall coefficient indicate highly anisotropic properties, reflecting the hexagonal-structure. The 5f(2)- and 5f(3)-CEF schemes, based on the localized 5f-electron nature, are discussed to understand the magnetic susceptibility and magnetization data. We have also done the magnetoresistance and de Haas-van Alphen (dHvA) experiments to investigate the Fermi surface properties. Both data are very complicated, implying that the Fermi surface is a multiply-connected one. They are explained neither by the localized 5f(2)- and 5f(3)-core models nor by the spin-polarized 5f-itinerant model. The cyclotron mass is, however, rather light, ranging from 0.17 to 6.2 m(0), which is consistent with the electronic specific heat coefficient of 11mJ/K-2.mol. |
| DOI | 10.1143/JPSJ.69.2647 |
| ISSN | 0031-9015 |