Heavy fermion state based on the kondo effect in EuNi2P 2

Yuichi Hiranaka; Ai Nakamura; Masato Hedo; Tetsuya Takeuchi; Akinobu Mori; Yusuke Hirose; Katsuya Mitamura; Kiyohiro Sugiyama; Masayuki Hagiwara; Takao Nakama; Yoshichika Onuki

doi:10.7566/JPSJ.82.083708

Heavy fermion state based on the kondo effect in EuNi₂P ₂

Yuichi Hiranaka, Ai Nakamura, Masato Hedo, Tetsuya Takeuchi, Akinobu Mori, Yusuke Hirose, Katsuya Mitamura, Kiyohiro Sugiyama, Masayuki Hagiwara, Takao Nakama, Yoshichika Onuki

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

70 Citations (Scopus)

Abstract

EuNi₂P₂ is known as a heavy fermion compound with an electronic specific heat coefficient γ = 100 mJ/(K²·mol) . We grew single crystals and studied their electronic and magnetic properties by measuring the electrical resistivity, magnetic susceptibility, high-field magnetization, specific heat, and thermal expansion. The present heavy fermion state is clarified to be based on the Kondo effect as in CeRu2Si2, revealing an intensive shrinkage of the volume below about 100K in the temperature dependence of thermal expansion. The temperature dependences of the 4f -electron contribution to the volume thermal expansion ΔV/V) 4f and the average Eu valence are found to show good scaling in EuNi₂P₂.

Original language	English
Article number	083708
Journal	journal of the physical society of japan
Volume	82
Issue number	8
DOIs	https://doi.org/10.7566/JPSJ.82.083708
Publication status	Published - 2013 Aug
Externally published	Yes

Keywords

EuNiP
Heavy fermion
Kondo effect
Specific heat
Thermal expansion

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.7566/JPSJ.82.083708

Cite this

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title = "Heavy fermion state based on the kondo effect in EuNi2P 2",

abstract = "EuNi2P2 is known as a heavy fermion compound with an electronic specific heat coefficient γ = 100 mJ/(K2·mol) . We grew single crystals and studied their electronic and magnetic properties by measuring the electrical resistivity, magnetic susceptibility, high-field magnetization, specific heat, and thermal expansion. The present heavy fermion state is clarified to be based on the Kondo effect as in CeRu2Si2, revealing an intensive shrinkage of the volume below about 100K in the temperature dependence of thermal expansion. The temperature dependences of the 4f -electron contribution to the volume thermal expansion ΔV/V) 4f and the average Eu valence are found to show good scaling in EuNi2P2.",

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author = "Yuichi Hiranaka and Ai Nakamura and Masato Hedo and Tetsuya Takeuchi and Akinobu Mori and Yusuke Hirose and Katsuya Mitamura and Kiyohiro Sugiyama and Masayuki Hagiwara and Takao Nakama and Yoshichika Onuki",

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T1 - Heavy fermion state based on the kondo effect in EuNi2P 2

AU - Hiranaka, Yuichi

AU - Nakamura, Ai

AU - Hedo, Masato

AU - Takeuchi, Tetsuya

AU - Mori, Akinobu

AU - Hirose, Yusuke

AU - Mitamura, Katsuya

AU - Sugiyama, Kiyohiro

AU - Hagiwara, Masayuki

AU - Nakama, Takao

AU - Onuki, Yoshichika

PY - 2013/8

Y1 - 2013/8

N2 - EuNi2P2 is known as a heavy fermion compound with an electronic specific heat coefficient γ = 100 mJ/(K2·mol) . We grew single crystals and studied their electronic and magnetic properties by measuring the electrical resistivity, magnetic susceptibility, high-field magnetization, specific heat, and thermal expansion. The present heavy fermion state is clarified to be based on the Kondo effect as in CeRu2Si2, revealing an intensive shrinkage of the volume below about 100K in the temperature dependence of thermal expansion. The temperature dependences of the 4f -electron contribution to the volume thermal expansion ΔV/V) 4f and the average Eu valence are found to show good scaling in EuNi2P2.

AB - EuNi2P2 is known as a heavy fermion compound with an electronic specific heat coefficient γ = 100 mJ/(K2·mol) . We grew single crystals and studied their electronic and magnetic properties by measuring the electrical resistivity, magnetic susceptibility, high-field magnetization, specific heat, and thermal expansion. The present heavy fermion state is clarified to be based on the Kondo effect as in CeRu2Si2, revealing an intensive shrinkage of the volume below about 100K in the temperature dependence of thermal expansion. The temperature dependences of the 4f -electron contribution to the volume thermal expansion ΔV/V) 4f and the average Eu valence are found to show good scaling in EuNi2P2.

KW - EuNiP

KW - Heavy fermion

KW - Kondo effect

KW - Specific heat

KW - Thermal expansion

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