Diffusion-controlled annihilation and aggregation of F-centers in 
thermochemically reduced MgO crystals

Kotomin, E. A.; Kuzovkov, V. N.; Popov, A. I.; Monge, M. A.; González, R.; Chen, Y.

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Diffusion-controlled annihilation and aggregation of F-centers in thermochemically reduced MgO crystals

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Kotomin, E. A.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Kuzovkov, V. N.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Popov, A. I.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Monge, M. A.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Kotomin, E. A., Kuzovkov, V. N., Popov, A. I., Monge, M. A., González, R., & Chen, Y. (2002). Diffusion-controlled annihilation and aggregation of F-centers in thermochemically reduced MgO crystals. Nuclear Instruments & Methods in Physics Research B, 191, 208-211.

Cite as: https://hdl.handle.net/21.11116/0000-000E-E2F1-2

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 x 10(18) 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.
(C) 2002 Published by Elsevier Science B.V.