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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 | 2002/01/14 |
| 形態種別 | その他 |
| 査読 | 査読あり |
| 標題 | A change of the Fermi surface in UGe2 across the critical pressure |
| 執筆形態 | その他 |
| 掲載誌名 | Journal of Physics Condensed Matter |
| 巻・号・頁 | 14(1),pp.L29-L36 |
| 担当区分 | 責任著者 |
| 著者・共著者 | R. Settai,M. Nakashima,S. Araki,Y. Haga,T. C. Kobayashi,N. Tateiwa,H. Yamagami,Y. Onuki |
| 概要 | We carried out the de Haas-van Alphen (dHvA) experiment under pressure for a ferromagnet UGe2. The dHvA frequency of a main dHvA branch named α, that corresponds to a majority up-spin band 40-hole Fermi surface, decreases monotonously with increasing pressure, but in the pressure range from P*c (≃1.2 GPa) to pc (≃1.5 GPa) the dHvA signal disappears completely, where pc and p*c correspond to critical pressures for a Curie temperature TC and the second phase transition temperature T* (<
TC), respectively. For p > pc we observed new dHvA branches with large cyclotron masses of 19-64m0, which correspond to main Fermi surfaces in the paramagnetic state. |
| DOI | 10.1088/0953-8984/14/1/104 |
| ISSN | 0953-8984 |