Hyperfine interactions of NpFeGa5 observed by237Np and57Fe Mössbauer spectroscopy

Yoshiya Homma; Saburo Nasu; Akio Nakamura; Masami Nakada; Dai Aoki; Naoto Metoki; Etsuji Yamamoto; Hironori Sakai; Shugo Ikeda; Yoshinori Haga; Yoshichika Onuki; Yoshinobu Shiokawa

Hyperfine interactions of NpFeGa₅ observed by²³⁷Np and⁵⁷Fe Mössbauer spectroscopy

Yoshiya Homma, Saburo Nasu, Akio Nakamura, Masami Nakada, Dai Aoki, Naoto Metoki, Etsuji Yamamoto, Hironori Sakai, Shugo Ikeda, Yoshinori Haga, Yoshichika Onuki, Yoshinobu Shiokawa

Materials Processing and Characterization Division

Research output: Contribution to journal › Article

2 Citations (Scopus)

Abstract

²³⁷Np and⁵⁷Fe Mössbauer spectroscopy have been applied for the antiferromagnet NpFeGa5 (T_n = 118 K). Hyperfine magnetic field H_hf at Fe nucleus of the NpFeGa₅ reaches 20.0±0.5 kOe at 4.2 K. The existence of small quadrupole interaction at Fe sites just below T_n was verified by a measurement of the spectrum in the applied field of 10 kOe. A correlation between the magnetic state and the electric field gradient implies that the origin of H_hf is not only due to the dipole field from magnetic Np atoms, but also from magnetic Fe atoms. Magnetic moment at Np atom is determined to be μn_p = 0.94 μb by the²³⁷Np Mössbauer spectrum at 10 K.

Original language	English
Pages (from-to)	44-46
Number of pages	3
Journal	journal of the physical society of japan
Volume	75
Issue number	SUPPL.
Publication status	Published - 2006 Dec 1

Keywords

Fe
Hyperfine interaction
Mössbauer spectroscopy
Np
NpFeGa

ASJC Scopus subject areas

Physics and Astronomy(all)

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Homma, Y., Nasu, S., Nakamura, A., Nakada, M., Aoki, D., Metoki, N., Yamamoto, E., Sakai, H., Ikeda, S., Haga, Y., Onuki, Y., & Shiokawa, Y. (2006). Hyperfine interactions of NpFeGa₅ observed by²³⁷Np and⁵⁷Fe Mössbauer spectroscopy. journal of the physical society of japan, 75(SUPPL.), 44-46.

Hyperfine interactions of NpFeGa₅ observed by²³⁷Np and⁵⁷Fe Mössbauer spectroscopy. / Homma, Yoshiya; Nasu, Saburo; Nakamura, Akio; Nakada, Masami; Aoki, Dai; Metoki, Naoto; Yamamoto, Etsuji; Sakai, Hironori; Ikeda, Shugo; Haga, Yoshinori; Onuki, Yoshichika; Shiokawa, Yoshinobu.

In: journal of the physical society of japan, Vol. 75, No. SUPPL., 01.12.2006, p. 44-46.

Research output: Contribution to journal › Article

Homma, Yoshiya ; Nasu, Saburo ; Nakamura, Akio ; Nakada, Masami ; Aoki, Dai ; Metoki, Naoto ; Yamamoto, Etsuji ; Sakai, Hironori ; Ikeda, Shugo ; Haga, Yoshinori ; Onuki, Yoshichika ; Shiokawa, Yoshinobu. / Hyperfine interactions of NpFeGa₅ observed by²³⁷Np and⁵⁷Fe Mössbauer spectroscopy. In: journal of the physical society of japan. 2006 ; Vol. 75, No. SUPPL. pp. 44-46.

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title = "Hyperfine interactions of NpFeGa5 observed by237Np and57Fe M{\"o}ssbauer spectroscopy",

abstract = "237Np and57Fe M{\"o}ssbauer spectroscopy have been applied for the antiferromagnet NpFeGa5 (Tn = 118 K). Hyperfine magnetic field Hhf at Fe nucleus of the NpFeGa5 reaches 20.0±0.5 kOe at 4.2 K. The existence of small quadrupole interaction at Fe sites just below Tn was verified by a measurement of the spectrum in the applied field of 10 kOe. A correlation between the magnetic state and the electric field gradient implies that the origin of Hhf is not only due to the dipole field from magnetic Np atoms, but also from magnetic Fe atoms. Magnetic moment at Np atom is determined to be μnp = 0.94 μb by the237Np M{\"o}ssbauer spectrum at 10 K.",

keywords = "Fe, Hyperfine interaction, M{\"o}ssbauer spectroscopy, Np, NpFeGa",

author = "Yoshiya Homma and Saburo Nasu and Akio Nakamura and Masami Nakada and Dai Aoki and Naoto Metoki and Etsuji Yamamoto and Hironori Sakai and Shugo Ikeda and Yoshinori Haga and Yoshichika Onuki and Yoshinobu Shiokawa",

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T1 - Hyperfine interactions of NpFeGa5 observed by237Np and57Fe Mössbauer spectroscopy

AU - Homma, Yoshiya

AU - Nasu, Saburo

AU - Nakamura, Akio

AU - Nakada, Masami

AU - Aoki, Dai

AU - Metoki, Naoto

AU - Yamamoto, Etsuji

AU - Sakai, Hironori

AU - Ikeda, Shugo

AU - Haga, Yoshinori

AU - Onuki, Yoshichika

AU - Shiokawa, Yoshinobu

PY - 2006/12/1

Y1 - 2006/12/1

N2 - 237Np and57Fe Mössbauer spectroscopy have been applied for the antiferromagnet NpFeGa5 (Tn = 118 K). Hyperfine magnetic field Hhf at Fe nucleus of the NpFeGa5 reaches 20.0±0.5 kOe at 4.2 K. The existence of small quadrupole interaction at Fe sites just below Tn was verified by a measurement of the spectrum in the applied field of 10 kOe. A correlation between the magnetic state and the electric field gradient implies that the origin of Hhf is not only due to the dipole field from magnetic Np atoms, but also from magnetic Fe atoms. Magnetic moment at Np atom is determined to be μnp = 0.94 μb by the237Np Mössbauer spectrum at 10 K.

AB - 237Np and57Fe Mössbauer spectroscopy have been applied for the antiferromagnet NpFeGa5 (Tn = 118 K). Hyperfine magnetic field Hhf at Fe nucleus of the NpFeGa5 reaches 20.0±0.5 kOe at 4.2 K. The existence of small quadrupole interaction at Fe sites just below Tn was verified by a measurement of the spectrum in the applied field of 10 kOe. A correlation between the magnetic state and the electric field gradient implies that the origin of Hhf is not only due to the dipole field from magnetic Np atoms, but also from magnetic Fe atoms. Magnetic moment at Np atom is determined to be μnp = 0.94 μb by the237Np Mössbauer spectrum at 10 K.

KW - Fe

KW - Hyperfine interaction

KW - Mössbauer spectroscopy

KW - Np

KW - NpFeGa

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