研究者詳細 - 摂待　力生

MISC - 摂待　力生

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PrCu_2の四重極モーメントに基づくメタ磁性と磁歪

荒木新吾, 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. 秋の分科会 1996 ( 3 ) 148 - 148 1996年9月

Pr_<0.1>La_<0.9>Cu_2の単結晶育成と結晶場

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

日本物理学会講演概要集. 秋の分科会 1996 ( 3 ) 149 - 149 1996年9月

URu_2Si_2の単結晶育成と物性

大國仁, 芳賀芳範, 山本悦嗣, 稲田佳彦, 摂待力生, 大貫惇睦

日本物理学会講演概要集. 秋の分科会 1996 ( 3 ) 155 - 155 1996年9月

GdCu_2の単結晶育成と電気的性質

小柳篤史, 吉田良行, 摂待力生, 大貫惇睦

日本物理学会講演概要集. 秋の分科会 1996 ( 3 ) 150 - 150 1996年9月

Flux flow transport properties and peak effect in a CeRu2 single crystal

H Sato, Y Kobayashi, H Sugawara, Y Aoki, R Settai, Y Onuki

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 65 ( 6 ) 1536 - 1539 1996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：PHYSICAL SOC JAPAN

We have measured the electrical resistivity and Hall resistivity in the flux flow state to investigate the superconducting mixed state properties in a CeRu2 single crystal. We found that the peak effect, discussed in relation to the Fulde-Ferrel-Larkin-Ouchinnikov (FLLO) phases, persists up to a higher temperature than that reported previously based on magnetization and elastic measurements, which contradicts with the original FFLO theories. We have estimated the pinning force density from the dependence of the flux flow transport properties on the current density. We also report the normal state transport properties and the magnetization and compare them with those given in a recent report in which possible multiple phase superconductivity was proposed.

DOI： 10.1143/JPSJ.65.1536

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Fermi surface properties in CeCo2

H Sugawara, M Higuchi, O Inoue, T Nishigaki, Y Aoki, H Sato, R Settai, Y Onuki, A Hasegawa

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 65 ( 6 ) 1744 - 1750 1996年6月

記述言語：英語出版者・発行元：PHYSICAL SOC JAPAN

We have succeeded in oberving the de Haas-van Alphen (dHvA) effect in the mixed valent superconductor CeCo2. The detected dHvA frequencies range from 6.24 x 10(3) Oe to 8.77 x 10(7) Oe. The largest frequency branch shows almost no angular dependence, indicating a nearly spherical Fermi surface. The cyclotron effective masses are found to be highly enhanced compared to the free-electron mass mo, ranging from 0.97 mo to 10.9 mo. The magnetoresistance measurements gives an evidence that the Fermi surface sheets are all closed without any open orbits. Band structure calculation based on a relativistic linear augmented-plane-wave (RLAPW) method, assuming the 4f electrons as itinerant, is in reasonably good agreement with the experimental dHvA results.

DOI： 10.1143/JPSJ.65.1744

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Magnetoresistance and the anisotropic hybridization gap in CeNiSn

Y Inada, H Azuma, R Settai, D Aoki, Y Onuki, K Kobayashi, T Takabatake, G Nakamoto, H Fujii, K Maezawa

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 65 ( 5 ) 1158 - 1161 1996年5月

記述言語：英語出版者・発行元：PHYSICAL SOC JAPAN

We have measured the magnetoresistance of the orthorhombic CeNiSn at high fields up to 15 T and at low temperatures down to 0.4 K. The positive magnetoresistance is found to become dominant with the decrease of temperature for the magnetic field H applied along the b- and c-axes in the transverse configuration between the current J and the held H (J perpendicular to H). On the other hand, the longitudinal magnetoresistance (J parallel to H) is small in magnitude for H parallel to b and c. For H parallel to a, the magnetoresistance is negative for any current direction. These experimental results have been discussed on the basis of the cyclotron motion of the compensated carriers with closed Fermi surfaces and the reduction of the anisotropic hybridization gap.

DOI： 10.1143/JPSJ.65.1158

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Transport properties in LaAg and CeAg single crystals

H Sato, H Sugawara, Y Aoki, K Motoki, R Settai, Y Onuki

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 65 ( 5 ) 1329 - 1333 1996年5月

記述言語：英語出版者・発行元：PHYSICAL SOC JAPAN

We have measured the Hall effect, magnetoresistance, thermoelectric power, magnetic susceptibility and magnetization in CeAg and LaAg single crystals. We observed clear anomalies related with a ferromagnetic transition at 5.5 K and a quadrupolar ordering at 17 K both in the Hall effect and magnetic susceptibility for CeAg.

DOI： 10.1143/JPSJ.65.1329

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Anisotropic thermal expansion and field-induced structural phase transition in PrCu2

T Takeuchi, P Ahmet, M Abliz, R Settai, Y Onuki

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 65 ( 5 ) 1404 - 1408 1996年5月

記述言語：英語出版者・発行元：PHYSICAL SOC JAPAN

The Jahn-Teller effect and metamagnetic transition in single crystalline PrCu2 have been studied by thermal expansion and magnetostriction measurements in the paramagnetic state. The linear thermal expansion in the temperature range from 1.8 to 300 K is found to be quite anisotropic in the whole temperature range, which is due to the highly anisotropic crystalline electric field. The magnetostrictions along the three crystallographic axes in the field along the c-axis also indicate anisotropic behavior with an extremely large length change and large hysteresis. It is clarified that the metamagnetic transition with the conversion of the Ising axis in PrCu2 is due to the large modification of the crystalline electric field by the field-induced structural phase transition.

DOI： 10.1143/JPSJ.65.1404

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Crystalline electric field and metamagnetic transition of PrCu2

P Ahmet, M Abliz, R Settai, K Sugiyama, Y Onuki, T Takeuchi, K Kindo, S Takayanagi

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 65 ( 4 ) 1077 - 1082 1996年4月

記述言語：英語出版者・発行元：PHYSICAL SOC JAPAN

We have measured the magnetic susceptibility and the magnetization of PrCu2. These magnetic properties are highly anisotropic, which are mainly due to the orthorhombic crystalline electric field (CEF). The energy scheme of the 4f levels in PrCu2 has been estimated by fitting the CEF theory to the susceptibility data. A new metamagnetism has been observed in the wide temperature range of 1.3 K to 50 K. The transition field increases almost linearly from 10 T to 32 T with the increase of temperature from 1.3 K to 50 K.

DOI： 10.1143/JPSJ.65.1077

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Crystalline electric field and metamagnetic transition of PrCu2

P Ahmet, M Abliz, R Settai, K Sugiyama, Y Onuki, T Takeuchi, K Kindo, S Takayanagi

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 65 ( 4 ) 1077 - 1082 1996年4月

記述言語：英語出版者・発行元：PHYSICAL SOC JAPAN

DOI： 10.1143/JPSJ.65.1077

Web of Science

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31p-YC-3 PrCu_2の磁場中比熱(1)(磁性(f電子系))