Advertisement

Journal of Materials Science

, Volume 25, Issue 2, pp 1487–1490 | Cite as

Characterization of synthetic diamonds by EPR and X-ray diffraction techniques

  • B. P. Singh
  • S. K. Gupta
  • U. Dhawan
  • Krishan Lal
Papers

Abstract

Electron paramagnetic resonance (EPR) spectroscopy and X-ray diffraction (XRD) studies were carried out on synthetic diamonds prepared using nickel, invar and monel as the catalyst solvents at high temperature and high pressure. Nitrogen and nickel were found to be the main impurities present in these specimens. α-Quartz and copper phases were also observed in some cases. The width of EPR hyperfine lines of nitrogen atoms was found to depend on the catalyst solvents used in the synthesis. These studies show that EPR and XRD techniques yield complementary results about the defects/impurities present in synthetic diamonds.

Keywords

Electron Paramagnetic Resonance Electron Paramagnetic Resonance Spectrum Electron Paramagnetic Resonance Signal Electron Paramagnetic Resonance Line Copper Metal 
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.
    F. P. Bundy et al. Nature 176 (1955) 51.CrossRefGoogle Scholar
  2. 2.
    J. E. Field (ed) in “The Properties of Diamond” (Academic, London, 1979) p. 425.Google Scholar
  3. 3.
    J. H. N. Loubser andJ. A. Vanwyk,Rep. Prog. Phys. 41 (1978) 1201.CrossRefGoogle Scholar
  4. 4.
    Y. Kamiya andA. R. Lang,J. Appl. Phys. 36 (1965) 579.CrossRefGoogle Scholar
  5. 5.
    B. P. Singh,Ind. J. Pure. Appl. Phys. 23 (1985) 604.Google Scholar
  6. 6.
    S. A. Altshuler andB. M. Kozyrev, “Electron Paramagnetic Resonance” (Academic, London, 1964) p. 5.CrossRefGoogle Scholar
  7. 7.
    B. K. Agarwala, B. P. Singh andS. K. Singhal,J. Cryst. Growth 74 (1986) 77.CrossRefGoogle Scholar
  8. 8.
    C. M. Huggins andP. Cannon,Nature 194 (1962) 829.CrossRefGoogle Scholar
  9. 9.
    W. V. Smith et al. Phys. Rev. 115 (1959) 1546.CrossRefGoogle Scholar
  10. 10.
    R. C. Barklie andJ. Guven,J. Phys. C 14 (1981) 3621.CrossRefGoogle Scholar
  11. 11.
    Krishnan Lal, S. K. Gupta andRashmi (to be communicated).Google Scholar
  12. 12.
    H. B. Dyer et al. Phil. Mag. 11 (1965) 763.CrossRefGoogle Scholar
  13. 13.
    J. H. N. Loubser andW. P. Van Ryneveld,Nature 211 (1966) 517.CrossRefGoogle Scholar
  14. 14.
    A. A. Giardini andJ. E. Tydings,Amer. Mineral. 47 (1962) 1393.Google Scholar
  15. 15.
    M. Prinz et al. in “Physics and Chemistry of Earths” Vol. 9, edited by L. H. Ahrenset al. (Pergamon, Oxford, 1975) p. 797.CrossRefGoogle Scholar

Copyright information

© Chapman and Hall Ltd 1990

Authors and Affiliations

  • B. P. Singh
    • 1
  • S. K. Gupta
    • 1
  • U. Dhawan
    • 1
  • Krishan Lal
    • 1
  1. 1.National Physical LaboratoryNew DelhiIndia

Personalised recommendations