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237Np and 57Fe Mössbauer study of NpFeGa5

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Abstract

57Fe and 237Np Mössbauer Ōmeasurements have been performed for NpFeGa5, which is one of the so-called neptunium 1-1-5 compounds. The 57Fe Mössbauer spectra below T N = 118 K show the magnetically ordered state. The magnitude of the hyperfine magnetic field at the 57Fe nucleus is determined to be 1.98 ± 0.05 T at 10 K. From the 237Np Mössbauer spectrum at 10 K, the hyperfine magnetic field at the 237Np nucleus is 203 T and the hyperfine coupling constant is determined to be 237 T/μB using the Np atomic magnetic moment of 0.86 μB determined by the neutron diffraction study.

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Authors and Affiliations

  1. Institute for Materials Research, Tohoku University, Sendai, Japan

    Y. Homma, S. Nasu, D. Aoki & Y. Shiokawa

  2. Nuclear Science and Engineering Directorate, Japan Atomic Energy Research Institute, Tokai-mura, Japan

    M. Nakada

  3. Advance Science Research Center, Japan Atomic Energy Research Institute, Tokai-mura, Japan

    A. Nakamura, S. Nasu, H. Sakai, S. Ikeda, E. Yamamoto, Y. Haga, Y. Ōnuki & Y. Shiokawa

  4. Graduate School of Science, Osaka University, Osaka, Japan

    Y. Ōnuki

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  1. Y. Homma
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  2. M. Nakada
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  3. A. Nakamura
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  4. S. Nasu
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  5. D. Aoki
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  6. H. Sakai
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  7. S. Ikeda
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  8. E. Yamamoto
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  9. Y. Haga
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  10. Y. Ōnuki
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  11. Y. Shiokawa
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Corresponding author

Correspondence to Y. Homma.

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Homma, Y., Nakada, M., Nakamura, A. et al. 237Np and 57Fe Mössbauer study of NpFeGa5 . Hyperfine Interact 168, 1175–1179 (2006). https://doi.org/10.1007/s10751-006-9419-x

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  • DOI: https://doi.org/10.1007/s10751-006-9419-x

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