Single crystal growth of large-size and high-quality NpCoGa5 and its electrical and magnetic properties

Dai Aoki; Yoshiya Homma; Yoshinobu Shiokawa; Etsuji Yamamoto; Akio Nakamura; Yoshinori Haga; Rikio Settai; Tetsuya Takeuchi; Yoshichika Onuki

doi:10.1143/JPSJ.73.1665

Single crystal growth of large-size and high-quality NpCoGa₅ and its electrical and magnetic properties

Dai Aoki, Yoshiya Homma, Yoshinobu Shiokawa, Etsuji Yamamoto, Akio Nakamura, Yoshinori Haga, Rikio Settai, Tetsuya Takeuchi, Yoshichika Onuki

IMR - Materials Processing and Characterization Division

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42 Citations (Scopus)

Abstract

We succeeded in growing a high-quality NpCoGa₅ single crystal by the Ga-flux method and measured its electrical resistivity, specific heat, magnetic susceptibility and magnetization. NpCoGa₅ is an antiferromagnet with a Néel temperature of 47 K. The magnetic moment of Np is directed along the [001] direction of a tetragonal crystal structure. A sharp metamagnetic transition was observed at H_m = 43 kOe for H ∥ [001], where the antiferromagnetic state is changed to the paramagnetic state above H_m. The ordered moment was determined to be 0.74 μ_B/Np. The magnetic properties were discussed on the basis of the crystalline electric field scheme of the 5f⁴ configuration.

Original language	English
Pages (from-to)	1665-1668
Number of pages	4
Journal	Journal of the Physical Society of Japan
Volume	73
Issue number	7
DOIs	https://doi.org/10.1143/JPSJ.73.1665
Publication status	Published - 2004 Jul

Keywords

CEF
Metamagnetism
NpCoGa
Transuranium compound

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10.1143/JPSJ.73.1665

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title = "Single crystal growth of large-size and high-quality NpCoGa5 and its electrical and magnetic properties",

abstract = "We succeeded in growing a high-quality NpCoGa5 single crystal by the Ga-flux method and measured its electrical resistivity, specific heat, magnetic susceptibility and magnetization. NpCoGa5 is an antiferromagnet with a N{\'e}el temperature of 47 K. The magnetic moment of Np is directed along the [001] direction of a tetragonal crystal structure. A sharp metamagnetic transition was observed at Hm = 43 kOe for H ∥ [001], where the antiferromagnetic state is changed to the paramagnetic state above Hm. The ordered moment was determined to be 0.74 μB/Np. The magnetic properties were discussed on the basis of the crystalline electric field scheme of the 5f4 configuration.",

keywords = "CEF, Metamagnetism, NpCoGa, Transuranium compound",

author = "Dai Aoki and Yoshiya Homma and Yoshinobu Shiokawa and Etsuji Yamamoto and Akio Nakamura and Yoshinori Haga and Rikio Settai and Tetsuya Takeuchi and Yoshichika Onuki",

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T1 - Single crystal growth of large-size and high-quality NpCoGa5 and its electrical and magnetic properties

AU - Aoki, Dai

AU - Homma, Yoshiya

AU - Shiokawa, Yoshinobu

AU - Yamamoto, Etsuji

AU - Nakamura, Akio

AU - Haga, Yoshinori

AU - Settai, Rikio

AU - Takeuchi, Tetsuya

AU - Onuki, Yoshichika

PY - 2004/7

Y1 - 2004/7

N2 - We succeeded in growing a high-quality NpCoGa5 single crystal by the Ga-flux method and measured its electrical resistivity, specific heat, magnetic susceptibility and magnetization. NpCoGa5 is an antiferromagnet with a Néel temperature of 47 K. The magnetic moment of Np is directed along the [001] direction of a tetragonal crystal structure. A sharp metamagnetic transition was observed at Hm = 43 kOe for H ∥ [001], where the antiferromagnetic state is changed to the paramagnetic state above Hm. The ordered moment was determined to be 0.74 μB/Np. The magnetic properties were discussed on the basis of the crystalline electric field scheme of the 5f4 configuration.

AB - We succeeded in growing a high-quality NpCoGa5 single crystal by the Ga-flux method and measured its electrical resistivity, specific heat, magnetic susceptibility and magnetization. NpCoGa5 is an antiferromagnet with a Néel temperature of 47 K. The magnetic moment of Np is directed along the [001] direction of a tetragonal crystal structure. A sharp metamagnetic transition was observed at Hm = 43 kOe for H ∥ [001], where the antiferromagnetic state is changed to the paramagnetic state above Hm. The ordered moment was determined to be 0.74 μB/Np. The magnetic properties were discussed on the basis of the crystalline electric field scheme of the 5f4 configuration.

KW - CEF

KW - Metamagnetism

KW - NpCoGa

KW - Transuranium compound

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ER -

Single crystal growth of large-size and high-quality NpCoGa₅ and its electrical and magnetic properties

Abstract

Keywords

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