Magnetic structure study of antiferromagnet NpPtGa5 by neutron diffraction

S. Jonen; N. Metoki; E. Yamamoto; Y. Homma; D. Aoki; Y. Shiokawa; Y. Onuki

doi:10.1016/j.jallcom.2007.04.027

Magnetic structure study of antiferromagnet NpPtGa₅ by neutron diffraction

S. Jonen, N. Metoki, E. Yamamoto, Y. Homma, D. Aoki, Y. Shiokawa, Y. Onuki

Materials Processing and Characterization Division

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

1 Citation (Scopus)

Abstract

The magnetic structure of NpPtGa₅was investigated by neutron diffraction. NpPtGa₅ exhibits an A-type antiferromagnetic structure with propagation vector over(q, →) = (0, 0, 1 / 2) below T_N = 26 K. The estimated Np magnetic moment is 0.38(5) μ_B, and it is oriented parallel to the 〈 1 0 0 〉 direction. This small moment would be consistent with the large γ = 123 mJ/(K² mol), indicative of the heavy fermion nature. The field-induced anomaly in the magnetic susceptibility is clarified to be a signature for an antiferromagnetic domain change between multi-domains to single-domain states.

Original language	English
Pages (from-to)	84-88
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	448
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2007.04.027
Publication status	Published - 2008 Jan 10

Keywords

Actinide alloy and compounds
Heavy fermion
Magnetically ordered materials
Neutron diffraction

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2007.04.027

Cite this

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title = "Magnetic structure study of antiferromagnet NpPtGa5 by neutron diffraction",

abstract = "The magnetic structure of NpPtGa5was investigated by neutron diffraction. NpPtGa5 exhibits an A-type antiferromagnetic structure with propagation vector over(q, →) = (0, 0, 1 / 2) below TN = 26 K. The estimated Np magnetic moment is 0.38(5) μB, and it is oriented parallel to the 〈 1 0 0 〉 direction. This small moment would be consistent with the large γ = 123 mJ/(K2 mol), indicative of the heavy fermion nature. The field-induced anomaly in the magnetic susceptibility is clarified to be a signature for an antiferromagnetic domain change between multi-domains to single-domain states.",

keywords = "Actinide alloy and compounds, Heavy fermion, Magnetically ordered materials, Neutron diffraction",

author = "S. Jonen and N. Metoki and E. Yamamoto and Y. Homma and D. Aoki and Y. Shiokawa and Y. Onuki",

year = "2008",

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T1 - Magnetic structure study of antiferromagnet NpPtGa5 by neutron diffraction

AU - Jonen, S.

AU - Metoki, N.

AU - Yamamoto, E.

AU - Homma, Y.

AU - Aoki, D.

AU - Shiokawa, Y.

AU - Onuki, Y.

PY - 2008/1/10

Y1 - 2008/1/10

N2 - The magnetic structure of NpPtGa5was investigated by neutron diffraction. NpPtGa5 exhibits an A-type antiferromagnetic structure with propagation vector over(q, →) = (0, 0, 1 / 2) below TN = 26 K. The estimated Np magnetic moment is 0.38(5) μB, and it is oriented parallel to the 〈 1 0 0 〉 direction. This small moment would be consistent with the large γ = 123 mJ/(K2 mol), indicative of the heavy fermion nature. The field-induced anomaly in the magnetic susceptibility is clarified to be a signature for an antiferromagnetic domain change between multi-domains to single-domain states.

AB - The magnetic structure of NpPtGa5was investigated by neutron diffraction. NpPtGa5 exhibits an A-type antiferromagnetic structure with propagation vector over(q, →) = (0, 0, 1 / 2) below TN = 26 K. The estimated Np magnetic moment is 0.38(5) μB, and it is oriented parallel to the 〈 1 0 0 〉 direction. This small moment would be consistent with the large γ = 123 mJ/(K2 mol), indicative of the heavy fermion nature. The field-induced anomaly in the magnetic susceptibility is clarified to be a signature for an antiferromagnetic domain change between multi-domains to single-domain states.

KW - Actinide alloy and compounds

KW - Heavy fermion

KW - Magnetically ordered materials

KW - Neutron diffraction

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