Pressure-induced superconductivity emerging from antiferromagnetic phase in CeNiGe 3

Hisashi Kotegawa; Keiki Takeda; Tomoyuki Miyoshi; Satoshi Fukushima; Hiroyuki Hidaka; Tatsuo C. Kobayashi; Teruhiko Akazawa; Yasuo Ohishi; Miho Nakashima; Arumugam Thamizhavel; Rikio Settai; Yoshichika Onuki

doi:10.1143/JPSJ.75.044713

Pressure-induced superconductivity emerging from antiferromagnetic phase in CeNiGe ₃

Hisashi Kotegawa, Keiki Takeda, Tomoyuki Miyoshi, Satoshi Fukushima, Hiroyuki Hidaka, Tatsuo C. Kobayashi, Teruhiko Akazawa, Yasuo Ohishi, Miho Nakashima, Arumugam Thamizhavel, Rikio Settai, Yoshichika Onuki

School of Science

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

26 Citations (Scopus)

Abstract

The antiferromagnet CeNiGe ₃ exhibits superconductivity under pressure. The Néel temperature initially increases with increasing pressure up to 3 GPa and then becomes zero at a critical pressure (P _C) that is located at approximately 7 GPa. We found that superconductivity emerges from 1.7 GPa in the antiferromagnetic (AF) phase removed from P _C. The superconductivity is realized in a wide pressure region including P ₃. The coefficient A in the resistivity and the upper critical field (H _c2) significantly change against pressure. A feature of CeNiGe ₃ is that the moderate heavy fermion state in the AF phase induces superconductivity.

Original language	English
Article number	044713
Journal	journal of the physical society of japan
Volume	75
Issue number	4
DOIs	https://doi.org/10.1143/JPSJ.75.044713
Publication status	Published - Apr 2006

Keywords

Antiferromagnetism
CeNiGe
Heavy fermion
Pressure effect
Superconductivity

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.75.044713

Cite this

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title = "Pressure-induced superconductivity emerging from antiferromagnetic phase in CeNiGe 3 ",

abstract = "The antiferromagnet CeNiGe 3 exhibits superconductivity under pressure. The N{\'e}el temperature initially increases with increasing pressure up to 3 GPa and then becomes zero at a critical pressure (P C) that is located at approximately 7 GPa. We found that superconductivity emerges from 1.7 GPa in the antiferromagnetic (AF) phase removed from P C. The superconductivity is realized in a wide pressure region including P 3. The coefficient A in the resistivity and the upper critical field (H c2) significantly change against pressure. A feature of CeNiGe 3 is that the moderate heavy fermion state in the AF phase induces superconductivity.",

keywords = "Antiferromagnetism, CeNiGe, Heavy fermion, Pressure effect, Superconductivity",

author = "Hisashi Kotegawa and Keiki Takeda and Tomoyuki Miyoshi and Satoshi Fukushima and Hiroyuki Hidaka and Kobayashi, {Tatsuo C.} and Teruhiko Akazawa and Yasuo Ohishi and Miho Nakashima and Arumugam Thamizhavel and Rikio Settai and Yoshichika Onuki",

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T1 - Pressure-induced superconductivity emerging from antiferromagnetic phase in CeNiGe 3

AU - Kotegawa, Hisashi

AU - Takeda, Keiki

AU - Miyoshi, Tomoyuki

AU - Fukushima, Satoshi

AU - Hidaka, Hiroyuki

AU - Kobayashi, Tatsuo C.

AU - Akazawa, Teruhiko

AU - Ohishi, Yasuo

AU - Nakashima, Miho

AU - Thamizhavel, Arumugam

AU - Settai, Rikio

AU - Onuki, Yoshichika

PY - 2006/4

Y1 - 2006/4

N2 - The antiferromagnet CeNiGe 3 exhibits superconductivity under pressure. The Néel temperature initially increases with increasing pressure up to 3 GPa and then becomes zero at a critical pressure (P C) that is located at approximately 7 GPa. We found that superconductivity emerges from 1.7 GPa in the antiferromagnetic (AF) phase removed from P C. The superconductivity is realized in a wide pressure region including P 3. The coefficient A in the resistivity and the upper critical field (H c2) significantly change against pressure. A feature of CeNiGe 3 is that the moderate heavy fermion state in the AF phase induces superconductivity.

AB - The antiferromagnet CeNiGe 3 exhibits superconductivity under pressure. The Néel temperature initially increases with increasing pressure up to 3 GPa and then becomes zero at a critical pressure (P C) that is located at approximately 7 GPa. We found that superconductivity emerges from 1.7 GPa in the antiferromagnetic (AF) phase removed from P C. The superconductivity is realized in a wide pressure region including P 3. The coefficient A in the resistivity and the upper critical field (H c2) significantly change against pressure. A feature of CeNiGe 3 is that the moderate heavy fermion state in the AF phase induces superconductivity.

KW - Antiferromagnetism

KW - CeNiGe

KW - Heavy fermion

KW - Pressure effect

KW - Superconductivity

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