Unconventional heavy-fermion superconductor CeCoIn5: dc magnetization study at temperatures down to 50 mK

T. Tayama; A. Harita; T. Sakakibara; Y. Haga; H. Shishido; R. Settai; Y. Onuki

Unconventional heavy-fermion superconductor CeCoIn₅: dc magnetization study at temperatures down to 50 mK

T. Tayama^*, A. Harita, T. Sakakibara, Y. Haga, H. Shishido, R. Settai, Y. Onuki

^*この論文の責任著者

物理学科

研究成果: ジャーナルへの寄稿 › 学術論文 › 査読

192 被引用数 (Scopus)

抄録

dc magnetization measurements on CeCoIn₅ reveal a first-order phase transition at H_c2 for both H∥a and c axes in the isothermal magnetization M(H) below 0.7 K, indicating a strong Pauli paramagnetic suppression in the even-parity pairing. M(T) in the normal state above H_c2 exhibits non-Fermi-liquid behavior down to 150 mK, implying the existence of antiferromagnetic fluctuations behind the unconventional superconductivity. We observed an unusual peak effect for H∥c in fields 5-30 kOe below 150 mK(=0.06T_c), whose anomalous temperature dependence cannot be simply explained by ordinary mechanisms.

本文言語	英語
論文番号	180504
ページ（範囲）	1805041-1805044
ページ数	4
ジャーナル	Physical Review B - Condensed Matter and Materials Physics
巻	65
号	18
出版ステータス	出版済み - 2002/05/01

ASJC Scopus 主題領域

電子材料、光学材料、および磁性材料
凝縮系物理学

引用スタイル

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title = "Unconventional heavy-fermion superconductor CeCoIn5: dc magnetization study at temperatures down to 50 mK",

abstract = "dc magnetization measurements on CeCoIn5 reveal a first-order phase transition at Hc2 for both H∥a and c axes in the isothermal magnetization M(H) below 0.7 K, indicating a strong Pauli paramagnetic suppression in the even-parity pairing. M(T) in the normal state above Hc2 exhibits non-Fermi-liquid behavior down to 150 mK, implying the existence of antiferromagnetic fluctuations behind the unconventional superconductivity. We observed an unusual peak effect for H∥c in fields 5-30 kOe below 150 mK(=0.06Tc), whose anomalous temperature dependence cannot be simply explained by ordinary mechanisms.",

author = "T. Tayama and A. Harita and T. Sakakibara and Y. Haga and H. Shishido and R. Settai and Y. Onuki",

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T1 - Unconventional heavy-fermion superconductor CeCoIn5

T2 - dc magnetization study at temperatures down to 50 mK

AU - Tayama, T.

AU - Harita, A.

AU - Sakakibara, T.

AU - Haga, Y.

AU - Shishido, H.

AU - Settai, R.

AU - Onuki, Y.

PY - 2002/5/1

Y1 - 2002/5/1

N2 - dc magnetization measurements on CeCoIn5 reveal a first-order phase transition at Hc2 for both H∥a and c axes in the isothermal magnetization M(H) below 0.7 K, indicating a strong Pauli paramagnetic suppression in the even-parity pairing. M(T) in the normal state above Hc2 exhibits non-Fermi-liquid behavior down to 150 mK, implying the existence of antiferromagnetic fluctuations behind the unconventional superconductivity. We observed an unusual peak effect for H∥c in fields 5-30 kOe below 150 mK(=0.06Tc), whose anomalous temperature dependence cannot be simply explained by ordinary mechanisms.

AB - dc magnetization measurements on CeCoIn5 reveal a first-order phase transition at Hc2 for both H∥a and c axes in the isothermal magnetization M(H) below 0.7 K, indicating a strong Pauli paramagnetic suppression in the even-parity pairing. M(T) in the normal state above Hc2 exhibits non-Fermi-liquid behavior down to 150 mK, implying the existence of antiferromagnetic fluctuations behind the unconventional superconductivity. We observed an unusual peak effect for H∥c in fields 5-30 kOe below 150 mK(=0.06Tc), whose anomalous temperature dependence cannot be simply explained by ordinary mechanisms.

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M3 - 学術論文

AN - SCOPUS:0001093057

SN - 0163-1829

VL - 65

SP - 1805041

EP - 1805044

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 18

M1 - 180504

ER -

Unconventional heavy-fermion superconductor CeCoIn5: dc magnetization study at temperatures down to 50 mK

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ASJC Scopus 主題領域

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引用スタイル

Unconventional heavy-fermion superconductor CeCoIn₅: dc magnetization study at temperatures down to 50 mK