研究者詳細 - 摂待　力生

MISC - 摂待　力生

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PrCu_2のメタ磁性II

アヘメトパールハット, アプリーズメリケ, 杉山清寛, 稲田佳彦, 摂待力生, 金道浩一, 大貫惇睦

日本物理学会講演概要集. 秋の分科会 1995 ( 3 ) 160 - 160 1995年9月

METAMAGNETIC TRANSITION IN PRCU2

K SUGIYAMA, P AHMET, M ABLIZ, H AZUMA, T TAKEUCHI, K KINDO, H SUGAWARA, K MOTOKI, H IKEZAWA, T EBIHARA, R SETTAI, Y ONUKI

PHYSICA B 211 ( 1-4 ) 145 - 147 1995年5月

EVIDENCE OF MULTIPLE SUPERCONDUCTING PHASES IN CERU2

T NAKAMA, M HEDO, T MAEKAWA, M HIGA, R RESEL, H SUGAWARA, R SETTAI, Y ONUKI, K YAGASAKI

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 64 ( 5 ) 1471 - 1475 1995年5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：PHYSICAL SOC JAPAN

Magnetoresistance, thermopower, Hall resistivity, ac susceptibility and magnetization have been measured for CeRu2 in the normal and superconducting phases. In the normal state, there is a magnetic anomaly at 50 K, which is presumably due to development of antiferromagnetic order. The H-T superconducting phase diagram obtained from ac susceptibility indicates the possibility of multiple superconducting phases.

DOI： 10.1143/JPSJ.64.1471

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ANOMALY OF MAGNETIZATION IN THE SUPERCONDUCTING MIXED-STATE OF UPT3

K TENYA, M IKEDA, T TAYAMA, H MITAMURA, H AMITSUKA, T SAKAKIBARA, K MAEZAWA, N KIMURA, R SETTAI, Y ONUKI

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 64 ( 4 ) 1063 - 1066 1995年4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：PHYSICAL SOC JAPAN

Magnetization curves of UPt3 along the c-axis were measured at low temperatures down to 80 mK. Below 350 mK a peak of the irreversible magnetization was found just below the superconducting upper critical field H-c2. However, the peak disappeared above 390 mK, which is much lower than the superconducting critical temperature of 580 mK, suggesting an unconventional mechanism of the flux pinning near H-c2. No distinct anomaly was observed in the magnetization curves at the phase transition between B and C superconducting phases.

DOI： 10.1143/JPSJ.64.1063

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重い電子系とドハース・ファンアルフェン効果

大貫惇睦, 摂待力生, オオヌキヨシチカ, セツタイリキオ

大阪大学低温センターだより 90 16 - 19 1995年4月

30p-PSB-4 単結晶CeAg及びLaAgの磁性と伝導

菅原仁, 青木勇二, 佐藤英行, 元木和行, 摂待力生, 大貫惇睦

日本物理学会講演概要集. 年会 50 ( 3 ) 141 - 141 1995年3月

30p-PSB-63 PrCu_2のドハース・ファナルフェン効果

アプリーズメリケ, アヘメトパールハット, 摂待力生, 杉山清寛, 大貫惇睦

日本物理学会講演概要集. 年会 50 ( 3 ) 169 - 169 1995年3月

30p-PSA-32 NdCu_2の磁場中比熱と磁気相図

高柳滋, 北島和典, 菅原仁, 大貫惇睦, 摂待力生, 伊土正幸

日本物理学会講演概要集. 年会 50 ( 3 ) 125 - 125 1995年3月

30p-PSA-31 PrCu_2のNMR

高橋晴美, 中村裕之, 志賀正幸, 摂待力生, 大貫惇睦

日本物理学会講演概要集. 年会 50 ( 3 ) 125 - 125 1995年3月

30p-PSB-64 PrCu_2のメタ磁性

アヘメトパールハット, アプリーズメリケ, 摂待力生, 杉山清寛, 竹内徹也, 大貫惇睦, 高柳滋

日本物理学会講演概要集. 年会 50 ( 3 ) 169 - 169 1995年3月

28a-YE-7 UPt_3のドハース・ファンアルフェン効果

木村憲彰, 摂待力生, 大貫惇睦, 前沢邦彦, 青木晴善

日本物理学会講演概要集. 年会 50 ( 3 ) 4 - 4 1995年3月

30p-PSB-65 NdCu_2の磁気相図と強磁場磁化

杉山清寛, 東恒, 摂待力生, 大貫惇睦, 金道浩一, 青木勇二, 菅原仁, 佐藤英行

日本物理学会講演概要集. 年会 50 ( 3 ) 170 - 170 1995年3月

Single crystal growth and superconducting properties of CeRu2

H. Sugawara, T. Yamazaki, N. Kimura, R. Settai, Y. Õnuki

Physica B: Physics of Condensed Matter 206-207 ( C ) 196 - 198 1995年2月

記述言語：英語

We have grown a single crystal of the superconductor CeRu2 by a zone-melting method in an induction furnace. We have measured the lower and upper superconducting critical fields, which are estimated as 250-400 Oe and 74 kOe at 0 K, respectively. Hc2 is slightly anisotropic, 64.8 kOe for the field along the 〈1 0 0〉 direction and 65.6 kOe for 〈1 1 0〉 at 1.5 K. The anomaly in the magnetization below Hc2 reported by another group was also investigated. © 1995.

DOI： 10.1016/0921-4526(94)00406-L

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De Haas-van Alphen effect study of CeRu2Si2

H. Aoki, M. Takashita, S. Uji, T. Terashima, K. Maezawa, R. Settai, Y. Onuki

Physica B: Physics of Condensed Matter 206-207 ( C ) 26 - 28 1995年2月

記述言語：英語

We report an extensive study of the angular dependence of the de Haas-van Alphen frequencies for the field directions in the (0 1 0) and (0 0 1) planes, and the field dependence of the effective masses and frequencies below and above the metamagnetic transition field (Hm) in CeRu2Si2. The present study confirms our previous conclusion that the Fermi surfaces change from those of itinerant f electrons below Hm to those of localized f electons above Hm. © 1995.

DOI： 10.1016/0921-4526(94)00358-3

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Single crystal growth and superconducting properties of CeRu2

H. Sugawara, T. Yamazaki, N. Kimura, R. Settai, Y. Onuki

PHYSICA B-CONDENSED MATTER 206 196 - 198 1995年2月

記述言語：英語出版者・発行元：ELSEVIER SCIENCE BV

We have grown a single crystal of the superconductor CeRu2 by a zone-melting method in an induction furnace. We have measured the lower and upper superconducting critical fields, which are estimated as 250-400 Oe and 74 kOe at 0 K, respectively. H-c2 is slightly anisotropic, 64.8 kOe for the field along the < 1 0 0 > direction and 65.6 kOe for < 1 1 0 > at 1.5 K. The anomaly in the magnetization below H-c2 reported by another group was also investigated.

DOI： 10.1016/0921-4526(94)00406-L

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Anomalous physical properties of the low carrier concentration state in f-electron systems

T. Suzuki, Y. Haga, D. X. Li, T. Matsumura, E. Hotta, A. Uesawa, M. Kohgi, T. Osakabe, S. Takagi, H. Suzuki, T. Kasuya, Y. Chiba, T. Goto, S. Nakamura, R. Settai, S. Sakatsume, A. Ochiai, K. Suzuki, S. Nimori, G. Kido, K. Ohyama, M. Date, Y. Morii, T. Terashima, S. Uji, H. Aoki, T. Naka, T. Matsumoto, Y. Ohara, H. Yoshizawa, Y. Okayama, Y. Okunuki, A. Ichikawa, H. Takahashi, N. Mori, T. Inoue, T. Kuroda, K. Sugiyama, K. Kindo, A. Mitsuda, S. Kimura, S. Takayanagi, N. Wada, A. Oyamada, K. Hashi, S. Maegawa, T. Goto, Y. S. Kwon, E. Vincent, P. Bonville

PHYSICA B-CONDENSED MATTER 206 771 - 779 1995年2月

記述言語：英語出版者・発行元：ELSEVIER SCIENCE BV

Recent progress in studies on low cartier concentration systems of magnetically ordered and non-magnetic heavy Fermion metals are discussed. Successive steps in the high field magnetisation, the magnetic structure, and the influence of high pressure are reported and the relation with the observed Fermi surface for CeP is discussed. The origin of the low cartier concentration in USb is also discussed based on the first observation of dHvA oscillations. It is also unambiguously demonstrated that the unconventional heavy Fermion state of Yb4As3 is intrinsic and not due to impurities.

DOI： 10.1016/0921-4526(94)00581-F

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Magnetic properties of single crystal CeFe2Ge2

T. Ebihara, K. Motoki, H. Toshima, M. Takashita, N. Kimura, H. Sugawara, K. Ichihashi, R. Settai, Y. Onuki, Y. Aoki, H. Sato

PHYSICA B-CONDENSED MATTER 206 219 - 221 1995年2月

記述言語：英語出版者・発行元：ELSEVIER SCIENCE BV

We have grown a single crystal of CeFe2Ge2 by a Czochralski pulling method in a tetra-arc furnace. The electrical resistivity and magnetic susceptibility are highly anisotropic, which is similar to CeRu2Si2. The electronic specific heat coefficient is 210 mJ/K-2 mol, indicating a heavy electron system with a non-magnetic ground state. These experimental results, including the magnetoresistance, are compared to those of LaFe2Ge2.

DOI： 10.1016/0921-4526(94)00413-P

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Fermi surfaces of YRu2Si2 and LaRu2Si2

R. Settai, H. Ikezawa, H. Toshima, M. Takashita, T. Ebihara, H. Sugawara, T. Kimura, K. Motoki, Y. Onuki

PHYSICA B-CONDENSED MATTER 206 23 - 25 1995年2月

記述言語：英語出版者・発行元：ELSEVIER SCIENCE BV

We have measured the de Haas-van Alphen effect of YRu2Si2 and LaRu2Si2 to clarify the Fermi surfaces and cyclotron masses. Main hole-Fermi surfaces of both compounds with a distorted ellipsoid shape are similar, occupying about half of the Brillouin zone. The small hole-Fermi surfaces with the shape of a rugby ball are three in number for LaRu2Si2, and one for YRu2Si2. An electron-Fermi surface consists of a doughnut like shape for LaRu2Si2, while a cylinder along the [0 0 1] direction and a multiply-connected shape exist for YRu2Si2. The cyclotron masses of YRu2Si2 are a little larger than those of LaRu2Si2.

DOI： 10.1016/0921-4526(94)00357-2

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METAMAGNETIC TRANSITION IN PRCU2 STUDIED BY THE DE HAAS-VAN-ALPHEN EFFECT

R SETTAI, M ABLIZ, P AHMET, K MOTOKI, N KIMURA, H IKEZAWA, T EBIHARA, H SUGAWARA, K SUGIYAMA, Y ONUKI

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 64 ( 2 ) 383 - 386 1995年2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：PHYSICAL SOC JAPAN

We have observed a metamagnetic transition in PrCu2 where a cooperative Jahn-Teller effect occurs below 8 K. This transition brings about a conversion between an easy and a hard axes in magnetization, which is reflected in a drastic change of the de Haas-van Alphen amplitude, that is a change of the scattering lifetime of conduction electrons. The origin of the metamagnetic transition is ascribed to a quadrupole moment of the 4f level.

DOI： 10.1143/JPSJ.64.383

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DE HAAS-VAN-ALPHEN STUDIES OF RARE-EARTH COMPOUNDS

R SETTAI, T EBIHARA, M TAKASHITA, H SUGAWARA, N KIMURA, K MOTOKI, Y ONUKI, S UJI, H AOKI

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 140 ( Pt 2 ) 1153 - 1154 1995年2月

記述言語：英語出版者・発行元：ELSEVIER SCIENCE BV

The de Haas-van Alphen amplitude of branch d in CeIn3 is reduced with oscillation by three orders of magnitude when the field is tilted from [100] to [110] in the {100} plane. This is explained by considering the angular dependence of the cyclotron mass and the electron spin g-factor.

DOI： 10.1016/0304-8853(94)01454-X

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MISC - 摂待 力生

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MISC - 摂待　力生