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Hyperfine Interactions

, Volume 68, Issue 1–4, pp 27–38 | Cite as

Mössbauer studies of interstitial rare earth-iron intermetallics

  • Qi-nian Qi
  • Hong Sun
  • J. M. D. Coey
Invited Talks

Abstract

Two series of interstitial rare earth-iron intermetallics, R2Fe17N3-σ and R2Fe17C3-σ have been prepared by gas phase reaction from the R2Fe17 parent compounds (R=Ce, Pr, Nd, ... Lu and Y). The interstitials raise the Curie temperature of the compounds by 390 K in the case of N and 330 K in the case of C. Mössbauer spectra at 15 K and 293 K, and data as a function of temperature for R=Er and Tm are analysed to yield hyperfine interactions at the four sites, and information on the local magnetization and its orientation. The change in hyperfine field is not proportional to the change in magnetization produced by the interstitials, being much greater in the nitrides than the carbides. Likewise for the isomer shifts. These effects are discussed in terms of the differences in electronic structure of the nitrides and carbides.

Keywords

Thin Film Carbide Nitrides Curie Temperature Parent Compound 
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.

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References

  1. /1/.
    J. M. D. Coey and Hong Sun, J. Magn. Mater.87 (1990) L251.ADSCrossRefGoogle Scholar
  2. /2/.
    J. M. D. Coey, Hong Sun, Y. Otani and D. P. F. Hurley, J. Magn. Magn. Mater.98 (1991) in press.Google Scholar
  3. /3/.
    Ying-chang Yang, Xiao-dong Zhang, Lin-shu Kong, Qi Pan and Sen-lin Ge, Appl. phys. Lett.58 (18) (1991) 2042.ADSCrossRefGoogle Scholar
  4. /4/.
    J. M. D. Coey, Y. Otani, Hong Sun and D. P. F. Hurley, J. Mag. Soc. Japan15 (4) (1991) in press.Google Scholar
  5. /5/.
    J. M. D. Coey, Physica Scripta (1991) in press.Google Scholar
  6. /6/.
    J. M. D. Coey, J. F. Lawler, Hong Sun and J. E. M. Allan, J. Appl. Phys.69 (5) (1991) 3007.ADSCrossRefGoogle Scholar
  7. /7/.
    T. W. Capehart, R. K. Mishra and F. E. Pinkerton, Appl. Phys. Lett.58 (13) (1991) 1395.ADSCrossRefGoogle Scholar
  8. /8/.
    R. M. Ibberson, O. Moze, T. H. Jacobs and K. H. J. Buschow, J. Phys.: Condens. Matter3 (1991) 1219.ADSCrossRefGoogle Scholar
  9. /9/.
    S. Miraglia, J. L. Soubeyroux, C. Kolbeck, O. Isnard, D. Fruchart and M. Guillot, preprint.Google Scholar
  10. /10/.
    Ying-chang Yang, Xiao-dong Zhang, Lin-shu Kong, Qi Pan, Ji-lian Yang, Yong-fan Ding, Bai-sheng Zhang, Chun-tang Ye and Lan Jin, The 5th Joint MMM-Intermag, Pittsburgh, Pennsylvania, June 1991.Google Scholar
  11. /11/.
    Bo-ping Hu, Hong-shuo Li, Hong Sun and J. M. D. Coey, J. Phys.: Condens. Matter3 (1991) 3983.ADSCrossRefGoogle Scholar
  12. /12/.
    D. H. Ryan and J. M. D. Coey, J. Phys. E19 (1986) 693.ADSCrossRefGoogle Scholar
  13. /13/.
    W. Steiner and R. Haferl, Phys. Status Solidi a42 (1977) 739.Google Scholar
  14. /14/.
    O. Eriksson, B. Johansson, R. C. Albers, A. M. Boring and M. S. S. Brooks, Phys. Rev. B42 (1990) 2707.ADSCrossRefGoogle Scholar
  15. /15/.
    D. L. Williamson, in “Mössbauer Isomer Shifts”, G. K. Shenoy and F. E. Wagner (eds), North Holland (1978).Google Scholar
  16. /16/.
    A. Freeman in “Mössbauer Isomer Shifts”, G. K. Shenoy and F. E. Wagner (eds), North Holland (1978).Google Scholar
  17. /17/.
    A. R. Miedema, P. F. de Châtel and F. R. de Boer, Physica B100 (1) (1980) 1.CrossRefGoogle Scholar
  18. /18/.
    R. Coehoorn, C. J. M. Denissen and R. Eppenga, J. Appl. Phys. 69 (8) (1991) 6222.ADSCrossRefGoogle Scholar

Copyright information

© J.C. Baltzer A.G., Scientific Publishing Company 1991

Authors and Affiliations

  • Qi-nian Qi
    • 1
  • Hong Sun
    • 1
  • J. M. D. Coey
    • 1
  1. 1.Department of Pure and Applied PhysicsTrinity CollegeDublin 2Ireland

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