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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 | 2010/02 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Magnetic and Fermi Surface Properties of CePd5Al2 and PrPd5Al2 |
| 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(2) |
| 著者・共著者 | Yasunori Nakano,Fuminori Honda,Tetsuya Takeuchi,Kiyohiro Sugiyama,Masayuki Hagiwara,Koichi Kindo,Etsuji Yamamoto,Yoshinori Haga,Rikio Settai,Hiroshi Yamagami,Yoshichika Onuki |
| 概要 | We succeeded in growing sin-le crystals of the antiferromagnet CePd5Al2, and the paramagnet PrPd5Al2 with a tetragonal crystal structure by the Bridgman method, and studied the magnetic and surface properties by measuring the electrical resistivity, magnetic susceptibility, magnetization, specific heat, and de Haas-van Alphen (dHvA) oscillation. We constructed the crystalline electric field (CEF) scheme from the experimentally observed anisotropic magnetic Susceptibility and magnetization Of CePd5Al2 and PrPd5Al2. In both compounds, the B-2(0) Value in the CEF parameters is negative and large, implying that the magnetic easy axis is the [001] direction. The present magnetism of CePd5Al2 and PrPd5Al2 is highly different from that of the heavy fermion superconductor NpPd5Al2 with the magnetic easy axis of the [100] direction. From the dHvA experiment for CePd5Al2 and PrPd5Al2, we observed a few dHvA branches. which correspond to nearly cylindrical band-32 hole and band-33 electron Fermi surfaces Of the non-4f reference LaPd5Al2, Reflecting the anisotropy of effective masses based on the nearly cylindrical Fermi surfaces along the tetragonal [001] direction, the Upper critical field H-c2 for H parallel to [100] in the pressure-induced superconductor CePd5Al2], is larger than that for H parallel to [001]: -dH(c2)/dT = 100kOe/K for H parallel to [100], and -dH(c2)/dT = 18kOe/K for H parallel to [001] at the superconducting transition temperature T-sc = 0.9 K. This anisotropy in H-c2 is also highly different from that of NpPd5Al2, suggesting that superconductivity is closely correlated with magnetism. |
| DOI | 10.1143/JPSJ.79.024702 |
| ISSN | 0031-9015 |