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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 | 2010/04 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Low-Temperature Magnetic Orderings and Fermi Surface Properties of LaCd11, CeCd11, and PrCd11 with a Caged Crystal Structure |
| 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 | 79(4) |
| 著者・共著者 | Shingo Yoshiuchi,Tetsuya Takeuchi,Masahiro Ohya,Keisuke Katayama,Masaki Matsushita,Naohisa Yoshitani,Naoto Nishimura,Hisashi Ota,Naoyuki Tateiwa,Etsuji Yamamoto,Yoshinori Haga,Hiroshi Yamagami,Fuminori Honda,Rikio Settai,Yoshichika Onuki |
| 概要 | We succeeded in growing single crystals of cage-structure compounds RCd11 (R: La, Ce, and Pr) and precisely studied their low-temperature magnetic and electronic properties by measuring electrical resistivity, magnetic susceptibility, magnetization, specific heat, and the de Haas-van Alphen (dHvA) effect. We found antiferromagnetic ordering at 0.44 and 0.39K in CeCd11 and PrCd11, respectively, and clarified the magnetic phase diagrams of the compounds. In addition, low-lying crystalline electric field (CEF) schemes were proposed from the specific heat results of both compounds. From the present study, the antiferromagnetic ordering in PrCd11 is found to be of the exchange-induced type with a singlet ground state. From the dHvA experiment, we detected small dHvA branches ranging from 7 x 10(5) to 2 x 10(7) Oe, which correspond to small Fermi surfaces. This is mainly due to a small Brillouin zone based on a large unit cell. Moreover, the dHvA frequencies and cyclotron masses are approximately the same among RCd11, revealing a localized character of 4f electrons in CeCd11 and PrCd(11)A. |
| DOI | 10.1143/JPSJ.79.044601 |
| ISSN | 0031-9015 |