研究者詳細 - 摂待　力生

MISC - 摂待　力生

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Fermi surface and Yamaji effect in Sr2RuO4

Y Yoshida, R Settai, Y Onuki, H Takei, K Betsuyaku, H Harima

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 67 ( 5 ) 1677 - 1681 1998年5月

記述言語：英語出版者・発行元：PHYSICAL SOC JAPAN

We have observed the de Haas-van Alphen (dHvA) oscillation of Sr2RuO4, the layered perovskite superconductor not based on copper. The Fermi surface was confirmed to be a corrugated cylinder. This characteristic feature of the Fermi surface brings about a large angular dependence of the dHvA amplitude, which is explained by the spin-splitting zero in the dHvA oscillation and the Yamaji effect.

DOI： 10.1143/JPSJ.67.1677

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1p-PSA-17 CeCu_6のメタ磁性的異常の熱物性

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

日本物理学会講演概要集 53 ( 1 ) 436 - 436 1998年3月

1p-PSA-16 CeCu_<5.9>Au_<0.1>単結晶の輸送測定

並木孝洋, 浦川淳, 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 53 ( 1 ) 436 - 436 1998年3月

1p-PSB-33 Pr基底-重項化合物の強磁場磁化過程

杉山清寛, 中島美帆, 小柳篤史, 荒木新吾, 摂待力生, 竹内徹也, 金道浩一, 大貫惇睦

日本物理学会講演概要集 53 ( 1 ) 454 - 454 1998年3月

1p-PSB-32 EuPb_3 のドハース・ファンアルフェン効果と磁性

青木大, 片山靖久, 野尻さやか, 幸崎正登, 鈴木悟仁, 常盤欣文, 摂待力生, 稲田佳彦, 杉山清寛, 大貫惇睦

日本物理学会講演概要集 53 ( 1 ) 454 - 454 1998年3月

30p-P-1 Sr_2RuO_4の山地効果

吉田良行, 向井厚史, 摂待力生, 大貫惇睦, 武居文彦, 別役潔, 播磨尚朝

日本物理学会講演概要集 53 ( 1 ) 532 - 532 1998年3月

30p-W-4 CeNiのdHvA効果

荒木新吾, 小柳篤史, 三沢玲, 摂待力生, 大貫惇睦

日本物理学会講演概要集 53 ( 1 ) 396 - 396 1998年3月

2a-W-7 CeRu_2のマイクロ波による磁場侵入長の測定

松井広志, 安田隆則, 成島正基, 夘尾崎寛, 辺土正人, 摂待力生, 大貫惇睦, 豊田直樹

日本物理学会講演概要集 53 ( 1 ) 464 - 464 1998年3月

31p-T-4 PrCu_6の核磁気秩序相の磁化II

畑徹, 川崎健司, 稲葉仁史, 松原明, 石川修六, 児玉隆夫, 小柳篤史, 摂待力生, 大貫惇睦

日本物理学会講演概要集 53 ( 1 ) 596 - 596 1998年3月

1p-PSA-30 PrCu_2単結晶における協同ヤン・テラー転移

高柳滋, 北嶋潤, 摂待力生, 大貫惇睦

日本物理学会講演概要集 53 ( 1 ) 439 - 439 1998年3月

Enhancement of superconducting transition temperature in CeCu2Ge2 under high pressures

TC Kobayashi, T Miyazu, N Takeshita, K Shimizu, K Amaya, Y Kitaoka, Y Onuki

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 67 ( 3 ) 996 - 999 1998年3月

記述言語：英語出版者・発行元：PHYSICAL SOC JAPAN

Enhancement of superconducting transition temperature T-c is confirmed at around 16 GPa in the pressure-induced superconductor CeCu2Ge2. The superconducting H-c-T-c phase diagrams at the low-T-c and high-T-c pressure regions indicates that the heavy quasi particles form the singlet Cooper pairs. At both low-T-c and high-T-c pressure regions, Fermi liquid behavior of rho similar to AT(2) is observed only at low temperatures below 1 K in the normal state induced by the external field above H-c2. At 21 GPa where the superconductivity disappears down to 50 mK, the temperature region following rho similar to AT(2) increases drastically up to 40 K and the coefficient. A decreases rapidly. These results indicate that the strongly correlated electrons are responsible essentially for the appearance of superconductivity in this system.

DOI： 10.1143/JPSJ.67.996

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Single Crystal Growth and Magnetic Properties of CeRh2Si2

Settai Rikio, Misawa Akira, Araki Shingo

大阪大学極限科学研究センタ-報告書 ( 2 ) 395 - 398 1998年3月

CeCu2の四重極相互作用に基づくメタ磁性

杉山清寛, 摂待力生, 中島美帆

大阪大学極限科学研究センタ-報告書 ( 2 ) 91 - 94 1998年3月

Anisotropic cooperative Jahn-Teller effect and metamagnetism in PrCu2

R Settai, S Araki, P Ahmet, M Abliz, K Sugiyama, K Onuki, T Goto, H Mitamura, T Goto, S Takayanagi

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 67 ( 2 ) 636 - 644 1998年2月

記述言語：英語出版者・発行元：PHYSICAL SOC JAPAN

We have studied the origin of the cooperative Jahn-Teller effect and the metamagnetic transition in the orthorhombic compound PrCu2. We have determined the anisotropic ferroquadrupole phase diagram by measuring the specific heat and thermal expansion under magnetic fields. With increasing the field, the Jahn-Teller transition temperature increases slightly for the field along a-and c-axes, while It decreases intensively along the b-axis. The phase diagram can he explained quantitatively by including the quadrupolar interaction of -K-JT (O-xy) O-xy in the crystalline electric field and Zeeman Hamiltonian. The metamagnetic transition, which brings about the conversion between the easy (a)- and hard (c)-axes magnetization, has been also studied through the magnetostriction. This phenomenon is also explained quantitatively on the basis of the quadrupolar interaction of -K-M (O-2(2)) O-2(2). The sign of (O-2(2)) is found to be negative in the state where the c-axis is the hard one, while it changes from negative to positive above the metamagnetic transition field.

DOI： 10.1143/JPSJ.67.636

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Anisotropic ferroquadrupolar phase in magnetic fields for PrCu2

R Settai, S Araki, P Ahmet, M Abliz, K Sugiyama, Y Onuki

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 177 357 - 358 1998年1月

記述言語：英語出版者・発行元：ELSEVIER SCIENCE BV

We have studied the origin of the cooperative Jahn-Teller effect in PrCu2. We have determined the anisotropic phase diagram by measuring the thermal expansion and the magnetostriction in magnetic fields up to 15 T. The Jahn-Teller transition temperature is almost constant for the field along the a- and c-axis, while it decreases with increasing the field along the b-axis. The phase diagram can be explained qualitatively by including the quadrupolar interaction for [0(xy)] in the crystalline electric field Hamiltonian. (C) 1998 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0304-8853(97)00500-3

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Enhancement of superconducting transition temperature in CeCu2Ge2 under high pressures

J. Phys. Soc. Jpn. 1998年

Thermal Expansion and de Haas-van Alphen Effect of CeRh2Si2

Shingo Araki, Akira Misawa, Rikio Settai, Tetsuya Takeuchi, Yoshichika Onuki

Journal of the Physical Society of Japan 67 ( 8 ) 2915 - 2918 1998年

記述言語：英語出版者・発行元：Physical Society of Japan

We have grown single crystals of CeRh2Si2 and LaRh2Si2, and measured the temperature dependence of the thermal expansion coefficient. The magnetic component of the thermal coefficient in CeRh2Si2 has been analyzed on the basis of the crystalline electric field. We have also succeeded in observing the de Haas-van Alphen (dHvA) effect of CeRh2Si2. The detected dHvA branches are small in cross-section and are observed in a narrow angle region centered at the symmetrical axis, reflecting the multiply-connected Fermi surface.

DOI： 10.1143/JPSJ.67.2915

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7p-YF-4 CeRu_2Si_2のメタ磁性転移近傍の非フェルミ液体的挙動

青木勇二, 松田達磨, 菅原仁, 佐藤英行, 大國仁, 摂待力生, 大貫惇睦, 山本嗣司, 芳賀芳則, 池田浩章, 三宅和正

日本物理学会講演概要集 52 ( 2 ) 533 - 533 1997年9月

6a-L-13 PrCu_2単結晶における核enhancement factorの異方性

高柳滋, 北嶋潤, 摂待力生, 大貫惇睦

日本物理学会講演概要集 52 ( 2 ) 617 - 617 1997年9月

6a-PS-32 CeRh_2Si_2の熱膨張

荒木新吾, 三沢玲, 竹内徹也, 摂待力生, 杉山清寛, 大貫惇睦

日本物理学会講演概要集 52 ( 2 ) 483 - 483 1997年9月

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