Advertisement

Journal of Materials Science

, Volume 29, Issue 24, pp 6518–6522 | Cite as

Mössbauer spectrometric study of Sm2Fe17Nx (x=0–8)

  • Hong-Ling Li
  • Koichi Takahashi
  • Yusuke Ujihira
  • Kurima Kobayashi
  • Takahiko Iriyama
  • Tokuzo Konishi
Papers

Abstract

Ternary rare-earth-iron-nitrogen compounds of Sm2Fe17Nx with x ranging from 0 up to 8, which have a rhombohedral structure of Th2Zn17 and a high Curie temperature up to 475–480°C depending on the degree of nitrogenation, were prepared by the nitrogenation of arc-melted Sm2Fe17 in mixed ammonia and hydrogen gas atmospheres of various ratios, and Mössbauer spectra of these compounds were observed at room temperature in order to analyse the physicochemical state of the nitrogenated products. The obtained data were analysed by focusing main attention on the effect of degree of nitrogenation on the variation of spectral profiles. Paramagnetic peaks due to an amorphous compound became prevalent as x became higher than ~ 2.3.

Keywords

Hydrogen Polymer Atmosphere Ammonia Material Processing 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    T. Iriyama, K. Kobayashi and H. Imai European Patent Application 0-369-097-A 1.Google Scholar
  2. 2.
    T. Iriyama, K. Kobayashi, H. Kato and Y. Nakagawa, J. Mag. Soc. Jpn 16 (1992) 153.CrossRefGoogle Scholar
  3. 3.
    K. Kobayashi, T. Iriyama, N. Imaoka, A. Sudo and N. Kashiwara, ibid. 0―417–733―A―2.CrossRefGoogle Scholar
  4. 4.
    Y. Otani, D. P. F. Huriey, Hong Sun and J. M. D. Coey, J. Appl. Phys. 69 (1991) 5584.CrossRefGoogle Scholar
  5. 5.
    G. Zouganelis, M. Anagnostou and D. Niarchos, Solid. State. Commun. 77 (1991) 11.CrossRefGoogle Scholar
  6. 6.
    H. Imai and T. Iriyama, Japanese Patent 2-57663.Google Scholar
  7. 7.
    T. Iriyama, K. Kobayashi, N. Imaoka, T. Fukuda, H. Kato and Y. Nakagawa, IEEE Trans. Magn. 28 (1992) 2326.CrossRefGoogle Scholar
  8. 8.
    K. H. J. Buschow and A. S. Van Der Goot, J. Less-Common Met. 14 (1968) 323.CrossRefGoogle Scholar
  9. 9.
    P. C. M. Gubbens, A. M. Van Der Kraan and K. H. J. Buschow, Phys. Rev. 39 (1989) 12548.CrossRefGoogle Scholar
  10. 10.
    K. Kobayashi, T. Iriyama, N. Imaoka, T. Suzuki, H. Kato and Y. Nakagawa, in Proceedings of 12th International Workshop on Rare Earth Magnets and Their Applications, Canberra, 1992, p. 32.Google Scholar
  11. 11.
    T. W. Capehart, R. K. Mishra and F. E. Pinkerton, Appl. Phys. Lett. 58 (1991) 1395.CrossRefGoogle Scholar

Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • Hong-Ling Li
    • 1
  • Koichi Takahashi
    • 1
  • Yusuke Ujihira
    • 1
  • Kurima Kobayashi
    • 2
  • Takahiko Iriyama
    • 2
  • Tokuzo Konishi
    • 2
    • 3
  1. 1.Research Centre for Advanced Science and TechnologyThe University of TokyoTokyoJapan
  2. 2.Central LaboratoryAsahi Chemical Industry Co. LtdShizuoka prefectureJapan
  3. 3.Analytical Research CentreAsahi Chemical Industry Co. LtdShizuoka prefectureJapan

Personalised recommendations