Magnetization study of the heavy fermion superconductor CeCoIn5

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

doi:10.1016/S0022-3697(02)00008-2

Magnetization study of the heavy fermion superconductor CeCoIn₅

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

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

We report the high-resolution dc magnetization measurements in the heavy fermion superconductor CeCoIn₅ at very low temperatures down to 50 mK in fields up to 125 kOe. A clear magnetization jump is observed at the upper critical field H_c2 for both H∥a and c axes in the isothermal magnetization curve below 0.7 K, indicating the existence of a first-order phase transition at H_c2. It is likely that the first-order phase transition is ascribed to a strong Pauli paramagnetic suppression in the even-parity pairing. In the normal state above H_c2 we found non-Fermi liquid behavior in the temperature dependence of the magnetization down to 150 mK, suggesting the presence of antiferromagnetic fluctuations.

Original language	English
Pages (from-to)	1155-1158
Number of pages	4
Journal	Journal of Physics and Chemistry of Solids
Volume	63
Issue number	6-8
DOIs	https://doi.org/10.1016/S0022-3697(02)00008-2
State	Published - 2002

Keywords

A. Intermetallic compounds
D. Critical phenomena
D. Magnetic properties
D. Phase transitions
D. Superconductivity

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

Access to Document

10.1016/S0022-3697(02)00008-2

Cite this

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title = "Magnetization study of the heavy fermion superconductor CeCoIn5",

abstract = "We report the high-resolution dc magnetization measurements in the heavy fermion superconductor CeCoIn5 at very low temperatures down to 50 mK in fields up to 125 kOe. A clear magnetization jump is observed at the upper critical field Hc2 for both H∥a and c axes in the isothermal magnetization curve below 0.7 K, indicating the existence of a first-order phase transition at Hc2. It is likely that the first-order phase transition is ascribed to a strong Pauli paramagnetic suppression in the even-parity pairing. In the normal state above Hc2 we found non-Fermi liquid behavior in the temperature dependence of the magnetization down to 150 mK, suggesting the presence of antiferromagnetic fluctuations.",

keywords = "A. Intermetallic compounds, D. Critical phenomena, D. Magnetic properties, D. Phase transitions, D. Superconductivity",

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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journal = "Journal of Physics and Chemistry of Solids",

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TY - JOUR

T1 - Magnetization study of the heavy fermion superconductor CeCoIn5

AU - Tayama, T.

AU - Harita, A.

AU - Sakakibara, T.

AU - Haga, Y.

AU - Shishido, H.

AU - Settai, R.

AU - Onuki, Y.

PY - 2002

Y1 - 2002

N2 - We report the high-resolution dc magnetization measurements in the heavy fermion superconductor CeCoIn5 at very low temperatures down to 50 mK in fields up to 125 kOe. A clear magnetization jump is observed at the upper critical field Hc2 for both H∥a and c axes in the isothermal magnetization curve below 0.7 K, indicating the existence of a first-order phase transition at Hc2. It is likely that the first-order phase transition is ascribed to a strong Pauli paramagnetic suppression in the even-parity pairing. In the normal state above Hc2 we found non-Fermi liquid behavior in the temperature dependence of the magnetization down to 150 mK, suggesting the presence of antiferromagnetic fluctuations.

AB - We report the high-resolution dc magnetization measurements in the heavy fermion superconductor CeCoIn5 at very low temperatures down to 50 mK in fields up to 125 kOe. A clear magnetization jump is observed at the upper critical field Hc2 for both H∥a and c axes in the isothermal magnetization curve below 0.7 K, indicating the existence of a first-order phase transition at Hc2. It is likely that the first-order phase transition is ascribed to a strong Pauli paramagnetic suppression in the even-parity pairing. In the normal state above Hc2 we found non-Fermi liquid behavior in the temperature dependence of the magnetization down to 150 mK, suggesting the presence of antiferromagnetic fluctuations.

KW - A. Intermetallic compounds

KW - D. Critical phenomena

KW - D. Magnetic properties

KW - D. Phase transitions

KW - D. Superconductivity

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DO - 10.1016/S0022-3697(02)00008-2

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VL - 63

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JO - Journal of Physics and Chemistry of Solids

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