Identification of cobalt on a lattice site in diamond

D. J. Twitchen, J. M. Baker, M. E. Newton, and K. Johnston
Phys. Rev. B 61, 9 – Published 1 January 2000
PDFExport Citation

Abstract

We report the finding of an electron-paramagnetic-resonance (EPR) center, labeled O4, which contains cobalt on a site in the diamond lattice. O4 is observed at low temperatures (<30K) in high temperature and pressure synthetic diamonds grown with a cobalt containing metal-solvent catalyst after a high-temperature anneal at 1800 °C. The center has S=1/2, monoclinic I symmetry and a hyperfine splitting from a nucleus with I=7/2. Analysis of the measured hyperfine interaction in terms of 3d5 gives the unpaired electronic wave function on the cobalt atom, and correctly predicts the measured g matrix. The wide linewidth of the EPR absorption suggests a small hyperfine interaction arising from a nearby nitrogen atom. Based on this evidence, a model for O4 is presented in terms of a CoN complex.

  • Received 6 July 1999

DOI:https://doi.org/10.1103/PhysRevB.61.9

©2000 American Physical Society

Authors & Affiliations

D. J. Twitchen*, J. M. Baker, and M. E. Newton

  • Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom

K. Johnston

  • Department of Physics, King’s College London, Strand, London WC2R 2LS, United Kingdom

  • *Author to whom correspondence should be addressed.

References (Subscription Required)

Click to Expand
Issue

Vol. 61, Iss. 1 — 1 January 2000

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×