研究者詳細 - 摂待　力生

MISC - 摂待　力生

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Spin-polarized electron momentum density in GdRh3B2

Y Sakurai, M Itou, A Andrejczuk, A Kodama, Y Obiraki, R Settai, Y Onuki

PHYSICA B-CONDENSED MATTER 378-80 1156 - 1157 2006年5月

記述言語：英語出版者・発行元：ELSEVIER SCIENCE BV

The spin-polarized electron momentum density (EMD) of single-crystal ferromagnetic GdRh3B2 has been probed by the magnetic Compton scattering technique. The spin moment is determined to be 6.83 +/- 0.439B per formula unit and the one-dimensional projection of the spin-polarized EMD (magnetic Compton profile) is obtained along the [10 (1) over bar 0] direction. These results are in good agreement with those predicted by a first-principles band structure computation with the spin-orbit interactions. (c) 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.physb.2006.01.464

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Pressure-induced superconductivity emerging from antiferromagnetic phase in CeNiGe 3

Hisashi Kotegawa, Keiki Takeda, Tomoyuki Miyoshi, Satoshi Fukushima, Hiroyuki Hidaka, Tatsuo C. Kobayashi, Teruhiko Akazawa, Yasuo Ohishi, Miho Nakashima, Arumugam Thamizhavel, Rikio Settai, Yoshichika Onuki

Journal of the Physical Society of Japan 75 ( 4 ) 2006年4月

記述言語：英語

The antiferromagnet CeNiGe 3 exhibits superconductivity under pressure. The Néel temperature initially increases with increasing pressure up to 3 GPa and then becomes zero at a critical pressure (P C) that is located at approximately 7 GPa. We found that superconductivity emerges from 1.7 GPa in the antiferromagnetic (AF) phase removed from P C. The superconductivity is realized in a wide pressure region including P 3. The coefficient A in the resistivity and the upper critical field (H c2) significantly change against pressure. A feature of CeNiGe 3 is that the moderate heavy fermion state in the AF phase induces superconductivity. ©2006 The Physical Society of Japan.

DOI： 10.1143/JPSJ.75.044713

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Fermi surface property of CeCoGe3 and LaCoGe3 without inversion symmetry in the tetragonal crystal structure

A Thamizhavel, H Shishido, Y Okuda, H Harima, TD Matsuda, Y Haga, R Settai, Y Onuki

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 75 ( 4 ) 2006年4月

記述言語：英語出版者・発行元：PHYSICAL SOC JAPAN

We carried out the de Haas-van Alphen (dHvA) experiment of an anti ferromagnet CeCoGe3 and its reference compound LaCoGe3 without inversion symmetry in the tetragonal crystal structure. The detected dHvA branches are similar between the two compounds. All the dHvA branches in LaCoGe3 are well explained by the results of energy band calculations. There exist three types of compenstated Fermi surfaces. Each Fermi surface is found to consist of two types of similar Fermi surfaces, which is characteristic in the crystal structure without inversion symmetry. The main dHvA branch of CeCoGe3 is found to possess the relatively large cyclotron mass m(c)* similar or equal to 10m(0) (m(o): rest mass of an electron), which is compared to 1m(0) in LaCoGe3.

DOI： 10.1143/JPSJ.75.044711

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Electronic states in a semimetal Ce3Sn7

Y Okuda, MT Suzuki, H Harima, M Nakashima, S Kirita, TC Kobayashi, R Settai, Y Onuki

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 75 ( 4 ) 2006年4月

記述言語：英語出版者・発行元：PHYSICAL SOC JAPAN

We carried out the de Haas-van Alphen (dHvA) measurement and the pressure experiment of the electrical resistivity for an antiferromagnet Ce3Sn7 with the orthorhombic crystal structure. The detected dHvA branches are many in number and their dHvA frequencies are extremely small in magnitude, indicating that Ce3Sn7 is a semimetal. This is consistent with the result of the energy band calculations under the assumption that the 4f electrons of two Ce atoms in the 2(a) site are localized and the 4f electron of one Ce atom in the 4(i) site is itinerant. In the pressure experiment, the Neel temperature of T-N = 5.3 K is found to slightly increase with increasing pressure, becomes maximum around 1 GPa, then decreases steeply with further increasing pressure and most likely becomes zero between 3 and 4GPa. The anti ferromagnetic state is changed into the non-magnetic state under pressure.

DOI： 10.1143/JPSJ.75.044715

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Pressure-induced heavy-fermion superconductivity in antiferromagnet CeIrSi 3 without inversion symmetry

Ichiro Sugitani, Yusuke Okuda, Hiroaki Shishido, Tsutomu Yamada, Arumugam Thamizhavel, Etsuji Yamamoto, Tatsuma D. Matsuda, Yoshinori Haga, Tetsuya Takeuchi, Rikio Settai, Yoshichika Onuki

Journal of the Physical Society of Japan 75 ( 4 ) 2006年4月

記述言語：英語

We report the discovery of pressure-induced superconductivity in an antiferromagnet CeIrSi 3, which lacks inversion symmetry in the tetragonal crystal structure. The Néel temperature T N = 5.0 K at ambient pressure decreases monotonically with increasing pressure, and becomes zero at about 2.5 GPa. Superconductivity appears in a wide pressure region from 1.8 GPa to about 3.5 GPa, with a relatively large superconduting transition temperature T sc = 1.6 K and a large upper critical field H c2(0) = 11.1 T at 2.5 GPa, indicating heavy-fermion superconductivity. ©2006 The Physical Society of Japan.

DOI： 10.1143/JPSJ.75.043703

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28pPSA-57 CeTX_3(T:遷移金属,X:Si,Ge)の物性(28pPSA 領域8ポスターセッション(f電子系等I),領域8(強相関系:高温超伝導,強相関f電子系など))

下田哲哉, 藤江朋大, 杉谷一朗, 山田勉, 奥田悠介, Thamizhavel Arumugam, 山本悦嗣, 松田達磨, 芳賀芳範, 竹内徹也, 摂待力生, 大貫惇睦

日本物理学会講演概要集 61 ( 1 ) 611 - 611 2006年3月

27aUF-4 CeIr_<1-x>Rh_xIn_5のdHvA効果(27aUF 重い電子系超伝導(Cell5系,他),領域8(強相関系:高温超伝導,強相関f電子系など))

宍戸寛明, 河井友也, 下田哲哉, 摂待力生, 播磨尚朝, 大貫惇睦, 安田敬, 植田大輝

日本物理学会講演概要集 61 ( 1 ) 518 - 518 2006年3月

29pPSA-20 Pr_3T_4Sn_<13>とCe_3T_4Sn_<13>(T:Co,Rh)の磁性(29pPSA 領域8ポスターセッション(f電子系等2),領域8(強相関系:高温超伝導,強相関f電子系など))

戸野広智絵, 大槌泰弘, Thamizhavel A, 中島弘, 森本正太郎, 松田達磨, 芳賀芳範, 萩原政幸, 杉山清寛, 竹内徹也, 摂待力生, 大貫惇睦

日本物理学会講演概要集 61 ( 1 ) 632 - 632 2006年3月

29pPSA-34 強磁性体CePtAlの圧力下電気抵抗(29pPSA 領域8ポスターセッション(f電子系等2),領域8(強相関系:高温超伝導,強相関f電子系など))

中島美帆, 植田泰輝, 清水克哉, 中島弘, タミザベルアルムガム, 立岩尚之, 芳賀芳範, 辺土正人, 上床美也, 摂待力生, 大貫惇睦

日本物理学会講演概要集 61 ( 1 ) 636 - 636 2006年3月

29pPSA-50 強磁性圧力誘起超伝導体UIrの純良単結晶育成と物性測定II(29pPSA 領域8ポスターセッション(f電子系等2),領域8(強相関系:高温超伝導,強相関f電子系など))

山本悦嗣, 立岩尚之, 芳賀芳範, 池田修悟, 松田達磨, 摂待力生, 大貫惇睦

日本物理学会講演概要集 61 ( 1 ) 640 - 640 2006年3月

29pRA-12 Ce系圧力誘起超伝導物質の高圧下物性研究(29pRA 重い電子系超伝導(CePt_3Si系等),領域8(強相関系:高温超伝導,強相関f電子系など))

立岩尚之, 芳賀芳範, 松田達磨, 植田泰輝, 中島美帆, Thamizhavel A, 竹内徹也, 摂待力生, 大貫惇睦

日本物理学会講演概要集 61 ( 1 ) 614 - 614 2006年3月

29pRA-10 反強磁性体CeIrSi_3とCeIrGe_3の電子状態(29pRA 重い電子系超伝導(CePt_3Si系等),領域8(強相関系:高温超伝導,強相関f電子系など))

奥田悠介, Thamizhavel A, 中島美帆, 竹内徹也, 辺土正人, 上床美也, 松田達磨, 芳賀芳範, 摂待力生, 大貫惇睦

日本物理学会講演概要集 61 ( 1 ) 614 - 614 2006年3月

27aUF-2 CeRhIn_5の4重臨界点 : 圧力下NQRによる研究(27aUF 重い電子系超伝導(Cell5系,他),領域8(強相関系:高温超伝導,強相関f電子系など))

八島光晴, 川崎慎司, 椋田秀和, 北岡良雄, 宍戸寛明, 摂待力生, 大貫惇睦

日本物理学会講演概要集 61 ( 1 ) 517 - 517 2006年3月

27aUF-7 NQRを用いた圧力下Ce_2RhIn_8の超伝導特性II(27aUF 重い電子系超伝導(Cell5系,他),領域8(強相関系:高温超伝導,強相関f電子系など))

宮崎弘士, 八島光晴, 川崎慎司, 北岡良雄, 宍戸寛明, 摂待力生, 大貫惇睦

日本物理学会講演概要集 61 ( 1 ) 518 - 518 2006年3月

29pRA-6 CePt_3Siにおける磁性と超伝導の比熱による研究(29pRA 重い電子系超伝導(CePt_3Si系等),領域8(強相関系:高温超伝導,強相関f電子系など))

竹内徹也, 安田敬, 大槌泰弘, 辻野真彦, 摂待力生, 大貫惇睦

日本物理学会講演概要集 61 ( 1 ) 613 - 613 2006年3月

28pPSA-56 交流/直流帯磁率測定でみたCePt_3Siの二段超伝導転移II(28pPSA 領域8ポスターセッション(f電子系等I),領域8(強相関系:高温超伝導,強相関f電子系など))

中辻景介, 住山昭彦, 小田祺景, 安田敬, 摂待力生, 大貫惇睦

日本物理学会講演概要集 61 ( 1 ) 611 - 611 2006年3月

27aUF-6 Metamagnetic transition in RRhIn_5 compounds (R: Nd, Tb, Dy and Ho)

Hieu Nguyen Van, Shishido Hiroaki, Nakashima Hiroshi, Sugiyama Kiyohiro, Settai Rikio, Araki Shingo, Nozue Yasuo, Matsuda Tatsuma D., Haga Yoshinori, Takeuchi Tetsuya, Jonen Shintaro, Metoki Naoto, Hagiwara Masayuki, Kindo Koichi, Onuki Yoshichika

日本物理学会講演概要集 61 ( 1 ) 518 - 518 2006年3月

29pRA-14 圧力誘起超伝導体CeNiGe_3の^<73>Ge-NQR測定II(29pRA 重い電子系超伝導(CePt_3Si系等),領域8(強相関系:高温超伝導,強相関f電子系など))

原田淳之, 川崎慎司, 椋田秀和, 北岡良雄, Arumugamu Thamizhavel, 奥田悠介, 摂待力生, 大貫惇睦, 伊藤公平, Haller E.E., 播磨尚朝

日本物理学会講演概要集 61 ( 1 ) 615 - 615 2006年3月

29pRA-4 CePt_3Siの^<29>Si-NMR II(29pRA 重い電子系超伝導(CePt_3Si系等),領域8(強相関系:高温超伝導,強相関f電子系など))

岩崎香織, 與儀護, 原田淳之, 川崎慎司, 椋田秀和, 北岡良雄, 安田敬, 摂待力生, 松田達磨, 芳賀芳範, 大貫惇睦, 伊藤公平, Haller E.E.

日本物理学会講演概要集 61 ( 1 ) 612 - 612 2006年3月

29pPSA-26 Single Crystal Growth and Magnetism in Ce-Pd-Si compounds

Dung N.D., Haga Y., Matsuda T.D., Thamizhavel A., Okuda Y., Takeuchi T., Sugiyama K., Hagiwara M., Kindo K., Settai R., Onuki Y.

日本物理学会講演概要集 61 ( 1 ) 634 - 634 2006年3月

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