研究者詳細 - 摂待　力生

MISC - 摂待　力生

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20aYD-7 極低温熱伝導率による擬二次元重い電子系超伝導体CeCoIn_5の超伝導対称性の決定

山口英正, 井澤公一, 松田祐司, 宍戸寛明, 摂待力生, 大貫惇睦

日本物理学会講演概要集 56 ( 2 ) 506 - 506 2001年9月

20aYD-3 重い電子系超伝導体CeCoIn_5の磁化

田山孝, 針田亮, 榊原俊郎, 宍戸寛明, 芳賀芳範, 摂待力生, 大貫惇睦

日本物理学会講演概要集 56 ( 2 ) 506 - 506 2001年9月

19aPS-41 CeCoIn_5の圧力下の物性

中脇宙一, 宍戸寛明, 日高宏之, 藤原旅人, 赤澤輝彦, 小林達生, 摂待力生, 大貫惇睦

日本物理学会講演概要集 56 ( 2 ) 478 - 478 2001年9月

Quasi-two-dimensional Fermi surfaces and the de Haas-van Alphen oscillation in both the normal and superconducting mixed states of CeCoIn5

R Settai, H Shishido, S Ikeda, Y Murakawa, M Nakashima, D Aoki, Y Haga, H Harima, Y Onuki

JOURNAL OF PHYSICS-CONDENSED MATTER 13 ( 27 ) L627 - L634 2001年7月

記述言語：英語掲載種別：速報，短報，研究ノート等（学術雑誌）出版者・発行元：IOP PUBLISHING LTD

We observed de Haas-van Alphen (dHvA) oscillation in both the normal and superconducting mixed states of a heavy-fermion superconductor CeCoIn5. The Fermi surfaces are found to consist of nearly cylindrical Fermi surfaces and small ellipsoidal ones, reflecting the unique tetragonal crystal structure. The detected cyclotron masses of 5-87 m(0) for these Fermi surfaces are extremely large, and correspond to a large electronic specific heat coefficient of about 1000 mi K-2 mol(-1). The cyclotron masses are also found to be field dependent in both the normal and mixed states.

DOI： 10.1088/0953-8984/13/27/103

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Angular position of nodes in the superconducting gap of quasi-2D heavy-fermion superconductor CeCoIn5

K Izawa, H Yamaguchi, Y Matsuda, H Shishido, R Settai, Y Onuki

PHYSICAL REVIEW LETTERS 87 ( 5 ) 057002 2001年7月

記述言語：英語出版者・発行元：AMERICAN PHYSICAL SOC

The thermal conductivity of the heavy-fermion superconductor CeCoIn5 has been studied in a magnetic field rotating within the 2D planes. A clear fourfold symmetry of the thermal conductivity which is characteristic of a superconducting gap with nodes along the (+/- pi, +/- pi) directions is resolved. The thermal conductivity measurement also reveals a first-order transition at H-c2, indicating a Pauli limited superconducting state. These results indicate that the symmetry most likely belongs to d(x2-y2), implying that the anisotropic antiferromagnetic fluctuation is relevant to the superconductivity.

DOI： 10.1103/PhysRevLett.87.057002

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Non-Fermi-liquid behaviour around the magnetic quantum critical point in UGa3

M Nakashima, Y Haga, F Honda, T Eto, G Oomi, T Kagayama, N Takeshita, T Nakanishi, N Mori, D Aoki, R Settai, Y Onuki

JOURNAL OF PHYSICS-CONDENSED MATTER 13 ( 24 ) L569 - L576 2001年6月

記述言語：英語掲載種別：速報，短報，研究ノート等（学術雑誌）出版者・発行元：IOP PUBLISHING LTD

We studied the electronic state of UGa3 by measuring the electrical resistivity under pressure. When pressure is applied to UGa3, the Neel temperature T-N = 67 K decreases steeply and becomes zero around 2.6 GPa. Correspondingly, the coefficient A in the electrical resistivity rho = rho (0) C AT(2), which is characteristic for Fermi liquid, increases steeply with increasing pressure. Around a magnetic quantum critical point of 2.6 GPa, a non-Fermi-liquid behaviour is found, showing a linear T-dependence of the resistivity, although the Fermi-liquid behaviour recovers above 4 GPa and the A-value decreases with increasing pressure. Furthermore, a resistivity drop, which might be related to superconductivity, was found below 0.3 K at 1.5 GPa, where the residual resistivity po has a maximum.

DOI： 10.1088/0953-8984/13/24/102

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Quasi-two dimensional Fermi surface properties of the antiferromagnet UNiGa5

Y Tokiwa, Y Haga, E Yamamoto, D Aoki, N Watanabe, R Settai, T Inoue, K Kindo, H Harima, Y Onuki

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 70 ( 6 ) 1744 - 1750 2001年6月

記述言語：英語出版者・発行元：PHYSICAL SOC JAPAN

We succeeded in growing a high-quality single crystal of all antiferromagnet UNiGa5 by the self-flux method, and measured the de Haas-van Alphen (dHvA) effect, together with the electrical resistivity, magnetoresistance, magnetic susceptibility and specific heat. Reflecting the peculiar tetragonal structure, the Fermi surface consists of one cylindrical and two closed ellipsoidal surfaces. The cyclotron mass is not large, ranging from 1.3 to 3.1 m(0).

DOI： 10.1143/JPSJ.70.1744

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Pressure Dependence of the Néel Temperature for a Dense Kondo Compound PrSn3 up to about 10 GPa

Mamoru Ishizuka, Shoichi Endo, Tetsuya Takeuchi, Rikio Settai, Yoshichika Onuki

Journal of the Physical Society of Japan 70 ( 6 ) 1855 - 1856 2001年6月

Pressure effects of susceptibility and specific heat in PrCu2

T Naka, J Tang, P Ahmet, R Settai, Y Onuki

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 226 ( 226-230 ) 1008 - 1010 2001年5月

記述言語：英語出版者・発行元：ELSEVIER SCIENCE BV

The pressure effects on magnetic susceptibility, specific heat and the co-operative Jahn-Teller transition temperature, T-JT, in the single crystalline sample are presented. At P = 1.2 GPa susceptibility shows remarkable maximum at T = T-max while specific heat shows no anomalous change around T-max. However, at T much less than T-JT the upturn of nuclear specific heat is developed with pressure. Our findings imply that a magnetic ordering is induced by pressure. (C) 2001 Published by Elsevier Science B.V.

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27aYK-12 UGa_3の磁性における圧力効果

中島美帆, 芳賀芳範, 本多史憲, 江藤徹二郎, 巨海玄道, 加賀山朋子, 竹下直, 中西剛司, 毛利信男, 常盤欣文, 青木大, 摂待力生, 大貫惇睦

日本物理学会講演概要集 56 ( 1 ) 447 - 447 2001年3月

30aZA-3 CeRu_4Sb_<12>のドハース・ファンアルフェン効果

阿部敬介, 松田達磨, 並木孝洋, 菅原仁, 青木勇二, 佐藤英行, 摂待力生, 大貫惇睦

日本物理学会講演概要集 56 ( 1 ) 574 - 574 2001年3月

27pYJ-8 dHvAと電子輸送から見たRFe_4P_<12>系の異常物性

菅原仁, 松田達磨, 阿部敬介, 並木孝洋, 青木勇二, 佐藤英行, 野尻さやか, 稲田佳彦, 摂待力生, 大貫惇睦

日本物理学会講演概要集 56 ( 1 ) 463 - 463 2001年3月

27aYK-10 UGe_2の圧力誘起超伝導II : 高圧下比熱測定

立岩尚之, 小林達生, 天谷喜一, 芳賀芳範, 摂待力生, 大貫惇睦

日本物理学会講演概要集 56 ( 1 ) 447 - 447 2001年3月

29pYK-8 LaRhIn_5及びLaIrIn_5のdHvA効果

宍戸寛明, 村川政男, 青木大, 池田修悟, 播磨尚朝, 摂待力生, 大貫惇睦

日本物理学会講演概要集 56 ( 1 ) 549 - 549 2001年3月

29pYK-6 CeCoIn_5の比熱

池田修悟, 青木大, 宍戸寛明, 渡辺なるみ, 青木勇二, 佐藤英行, 摂待力生, 芳賀芳範, 大貫惇睦

日本物理学会講演概要集 56 ( 1 ) 548 - 548 2001年3月

29pYK-7 CeCoIn_5のドハース・ファンアルフェン効果

摂待力生, 村川政男, 宍戸寛明, 池田修吾, 青木大, 中脇宙一, 中島美保, 芳賀芳範, 播磨尚朝, 大貫惇睦

日本物理学会講演概要集 56 ( 1 ) 549 - 549 2001年3月

28pYJ-6 磁性と超伝導の圧力誘起相図

小林達生, 立岩尚之, 村村孝樹, 花園勝巳, 清水克哉, 天谷喜一, 井上鉄太郎, 金道浩一, 青木大, 宍戸寛明, 摂待力生, 芳賀芳範, 大貫惇睦

日本物理学会講演概要集 56 ( 1 ) 508 - 508 2001年3月

28pYJ-5 希土類・ウラン化合物の試料の純良性と加圧下での超伝導発現

大貫惇睦, 摂待力生, 荒木新吾, 芳賀芳範

日本物理学会講演概要集 56 ( 1 ) 507 - 507 2001年3月

28aPS-55 UIrの磁性と物性

山本悦嗣, 芳賀芳範, 常盤欣文, 目時直人, 中村彰夫, 摂待力生, 大貫惇睦

日本物理学会講演概要集 56 ( 1 ) 502 - 502 2001年3月

28aPS-56 高圧下におけるUIrの電気抵抗測定

小林達生, 藤原旅人, 花園勝巳, 天谷喜一, 山本悦嗣, 摂待力生, 大貫惇睦

日本物理学会講演概要集 56 ( 1 ) 503 - 503 2001年3月

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