Thermal Evolution of Co Nano-crystallites in Co-Implanted and Annealed Sapphire

Z. Werner; W. Starosta; J. Piekoszewski; R. Grötzschel; M. Barlak; M. Pisarek; W. Szymczyk; K. Bocheńska

doi:10.14723/tmrsj.36.119

Regular Papers

Thermal Evolution of Co Nano-crystallites in Co-Implanted and Annealed Sapphire

Z. Werner, W. Starosta, J. Piekoszewski, R. Grötzschel, M. Barlak, M. Pisarek, W. Szymczyk, K. Bocheńska

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Keywords: Co nano-crystallites, implantation, sapphire, Ostwald ripening

JOURNAL FREE ACCESS

2011 Volume 36 Issue 1 Pages 119-121

DOI https://doi.org/10.14723/tmrsj.36.119

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Abstract

Thermal evolution of Co precipitates in sapphire implanted with 5∙10¹⁷ Co⁺ ions/cm² at 120 keV is studied. XRD measurements show that Co precipitates formed directly after implantation have average size of about 10 nm and grow in size to about 30 nm after annealing at 800 -1200℃ by means of monotonous Ostwald ripening process. In the final state they assume cubic form aligned with the sapphire lattice.

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