Applied Magnetic Resonance

, 28:355

EPR studies on the di-nitrogen centers with nonequivalent atoms in a reddish-brown plastically deformed diamond



Two new di-nitrogen centers, which were labeled M2 and M3, were found together with known W7 and N4 centers in an unusual reddish-brown natural diamond. The following magnetic hyperfine interaction parameters (expressed in MHz) were determined for the two nitrogen atoms:A1(1)=117.95(5),A1(2)=A1(3)=84.48(5),A2(1)=7.1(1),A2(2)=A2(3)=6.6(1) for M2 andA1(1)=121.55(5),A1(2)=A1(3)=85.90(5),A2(1)=6.0(1),A2(2)=5.4(1),A2(3)=5.1(1) for M3. Hyperfine interaction tensors for the nitrogen atom N1 with a larger interaction have axial symmetry about the <111> direction, but those for the other nitrogen atom, N2, appear to be small, almost isotropic. Probable models of the M2 and M3 centers are suggested and discussed.


  1. 1.
    Ammerlaan C.A.J. in: Landolt-Bornstein Numerical Data and Functional Relationships in Science and Technology. New series III (Madelung O., Schulz M., eds.), vol. 22b, pp. 117–206, Berlin: Springer 1990.Google Scholar
  2. 2.
    Loubser J.H.N., van Wyk J.A.: Rep. Prog. Phys.41, 1201–1248 (1978)CrossRefADSGoogle Scholar
  3. 3.
    Shcherbakova M.Ya., Sobolev E.V., Samsonenko N.D., Aksenov V.K.: Sov. Phys. Solid State11, 1104–1106 (1969)Google Scholar
  4. 4.
    Shcherbakova M.Ya., Sobolev E.V., Nadolinnyi V.A., Aksenov V.K.: Sov. Phys. Dokl.20, 795–798 (1975)Google Scholar
  5. 5.
    Loubser J.H.N., van Wyk J.A.: Mater. Res. Soc. Symp. Proc.46, 587 (1985)Google Scholar
  6. 6.
    Welbourn C.M.: Solid State Commun.26, 255–260 (1978)CrossRefADSGoogle Scholar
  7. 7.
    Loubser J.H.N., Wright A.C.J.: J. Phys. D Appl. Phys.6, 1129–1141 (1973)CrossRefADSGoogle Scholar
  8. 8.
    van Wyk J.A., Loubser J.H.N.: J. Phys. C Solid State Phys.16, 1501 (1983)CrossRefADSGoogle Scholar
  9. 9.
    Cox A., Newton M.E., Baker J.M.: J. Phys. Condens. Matter4, 8119–8130 (1992)CrossRefADSGoogle Scholar
  10. 10.
    Newton M.E., Baker J.M.: J. Phys. Condens. Matter3, 3591–3603 (1991)CrossRefADSGoogle Scholar
  11. 11.
    Newton M.E., Baker J.M.: J. Phys. Condens. Matter3, 3605–3616 (1991)CrossRefADSGoogle Scholar
  12. 12.
    Smith W.V., Sorokin P.P., Gelles I.L., Lasher G.J.: Phys. Rev.115, 1546–1552 (1959)CrossRefADSGoogle Scholar
  13. 13.
    Cook R.J., Whiffen D.H.: Proc. R. Soc. Lond. A295, 99–106 (1966)CrossRefADSGoogle Scholar
  14. 14.
    Morton J.R., Preston K.F.: J. Magn. Reson.30, 577–582 (1978)Google Scholar
  15. 15.
    Baker J.M., Newton M.E.: Appl. Magn. Reson.7, 209–235 (1994)CrossRefGoogle Scholar

Copyright information

© Springer 2005

Authors and Affiliations

  1. 1.Institute of Geology of Ore Deposits, Petrography, Mineralogy and GeochemistryRussian Academy of SciencesMoscowRussian Federation

Personalised recommendations