Pressure dependence of the first-order superconducting phase transition in CeCoIn5

Takashi Tayama; Yukie Namai; Toshiro Sakakibara; Masato Hedo; Yoshiya Uwatoko; Hiroaki Shishido; Rikio Settai; Yoshichika Onuki

doi:10.1143/JPSJ.74.1115

Pressure dependence of the first-order superconducting phase transition in CeCoIn₅

Takashi Tayama^*, Yukie Namai, Toshiro Sakakibara, Masato Hedo, Yoshiya Uwatoko, Hiroaki Shishido, Rikio Settai, Yoshichika Onuki

^*Corresponding author for this work

Department of Physics

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

16 Scopus citations

Abstract

The pressure dependence of the first-order phase transition (FOPT) at the upper critical field H_c2 in CeCoIn₅ has been studied by magnetization measurements. The FOPT is found to persist at pressures at least up to 1.5 GPa in the c axis and up to 1.38 GPa in the a axis. With increasing pressure, the anisotropy of H_c2 becomes stronger, and the condensation energy decreases significantly. We also observed a notable peak effect near H_c2 under pressure. Our results suggest that the FOPT cannot be accounted for by Pauli limiting alone.

Original language	English
Pages (from-to)	1115-1118
Number of pages	4
Journal	Journal of the Physical Society of Japan
Volume	74
Issue number	4
DOIs	https://doi.org/10.1143/JPSJ.74.1115
State	Published - 2005/04

Keywords

Cecoin
First-order superconducting phase transition
Heavy fermion superconductor
Hydrostatic pressure
Magnetization
Pauli limiting
Phase diagram

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1143/JPSJ.74.1115

Cite this

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title = "Pressure dependence of the first-order superconducting phase transition in CeCoIn5",

abstract = "The pressure dependence of the first-order phase transition (FOPT) at the upper critical field Hc2 in CeCoIn5 has been studied by magnetization measurements. The FOPT is found to persist at pressures at least up to 1.5 GPa in the c axis and up to 1.38 GPa in the a axis. With increasing pressure, the anisotropy of Hc2 becomes stronger, and the condensation energy decreases significantly. We also observed a notable peak effect near Hc2 under pressure. Our results suggest that the FOPT cannot be accounted for by Pauli limiting alone.",

keywords = "Cecoin, First-order superconducting phase transition, Heavy fermion superconductor, Hydrostatic pressure, Magnetization, Pauli limiting, Phase diagram",

author = "Takashi Tayama and Yukie Namai and Toshiro Sakakibara and Masato Hedo and Yoshiya Uwatoko and Hiroaki Shishido and Rikio Settai and Yoshichika Onuki",

year = "2005",

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T1 - Pressure dependence of the first-order superconducting phase transition in CeCoIn5

AU - Tayama, Takashi

AU - Namai, Yukie

AU - Sakakibara, Toshiro

AU - Hedo, Masato

AU - Uwatoko, Yoshiya

AU - Shishido, Hiroaki

AU - Settai, Rikio

AU - Onuki, Yoshichika

PY - 2005/4

Y1 - 2005/4

N2 - The pressure dependence of the first-order phase transition (FOPT) at the upper critical field Hc2 in CeCoIn5 has been studied by magnetization measurements. The FOPT is found to persist at pressures at least up to 1.5 GPa in the c axis and up to 1.38 GPa in the a axis. With increasing pressure, the anisotropy of Hc2 becomes stronger, and the condensation energy decreases significantly. We also observed a notable peak effect near Hc2 under pressure. Our results suggest that the FOPT cannot be accounted for by Pauli limiting alone.

AB - The pressure dependence of the first-order phase transition (FOPT) at the upper critical field Hc2 in CeCoIn5 has been studied by magnetization measurements. The FOPT is found to persist at pressures at least up to 1.5 GPa in the c axis and up to 1.38 GPa in the a axis. With increasing pressure, the anisotropy of Hc2 becomes stronger, and the condensation energy decreases significantly. We also observed a notable peak effect near Hc2 under pressure. Our results suggest that the FOPT cannot be accounted for by Pauli limiting alone.

KW - Cecoin

KW - First-order superconducting phase transition

KW - Heavy fermion superconductor

KW - Hydrostatic pressure

KW - Magnetization

KW - Pauli limiting

KW - Phase diagram

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DO - 10.1143/JPSJ.74.1115

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