6533b833fe1ef96bd129b5f8
RESEARCH PRODUCT
Diffusion-controlled annihilation and aggregation of F-centers in thermochemically reduced MgO crystals
V. N. KuzovkovAnatoli I. PopovEugene A. KotominEugene A. KotominY. ChenRoberto GonzálezM. A. Mongesubject
Nuclear and High Energy PhysicsCrystallographyMaterials scienceAnnihilationChemical physicsImpurityDiffusionElectronInstrumentationOxygen vacancydescription
Abstract The dynamics of F-center (an oxygen vacancy which has trapped two electrons) aggregation in thermochemically reduced MgO single crystals with an exceptionally high F-center concentration (6×1018 cm−3) is discussed. A theory of the Mg nanocavity formation process is developed based on diffusion-controlled aggregation of elastically interacting F centers and their annihilation at traps. We show that in contrast to the generally accepted viewpoint, the F centers in the bulk are not annealed out at the external sample surface but at internal defects, such as dislocations, subgrain boundaries and impurities. The mutual attraction of the F centers is a key factor controlling the aggregation process.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-05-01 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |