We report experimentally determined self-diffusion coefficients for carbon in a type-IaA diamond at pressure and temperature conditions within diamond stability field at 10GPa and 2075-2375K. The activation energy of diffusion is 6.8±1.6eV and a preexponent constant is of 4.1×10-5m2s [ln(-10.1±2.0)m2s]. The activation energy is approximately 30% lower than results predicted previously from ab initio calculations.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - Jul 1 2005|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics