Institute of Fundamental Technological Research
Polish Academy of Sciences

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Ihor Syvorotka

Scientific Research Company Carat Ukraina (UA)


Recent publications
1.  Sugak D., Syvorotka I., Yakhnevych U., Buryy O., Levintant-Zayonts N., Savytskyy H., Bonchyk O., Ubizskii S., Comparative investigations of nanohardness and impurity distribution profiles of lithium niobate single crystals diffusion doped by copper ions, Crystal Research and Technology, ISSN: 1521-4079, DOI: 10.1002/crat.201900117, Vol.54, No.12, pp.1900117-1-7, 2019

Abstract:
Spatial changes of optical and mechanical properties of doped lithium niobate (LN, LiNbO3) single crystals are investigated. The crystals are doped with copper ions by thermal diffusion at elevated temperatures. LiNbO3 crystal absorption spectra are recorded in a direction perpendicular to the direction of diffusion. The concentrations of copper ions are calculated using the Smakula–Dexter formula. To determine a relation between changes of optical and mechanical properties, the hardness profiles of the doped crystals are investigated by the nanoindentation technique. Young's modulus and hardness are specified in accordance with the Oliver–Pharr method.

Affiliations:
Sugak D. - other affiliation
Syvorotka I. - Scientific Research Company Carat Ukraina (UA)
Yakhnevych U. - Lviv Polytechnic National University (UA)
Buryy O. - Lviv Polytechnic National University (UA)
Levintant-Zayonts N. - IPPT PAN
Savytskyy H. - Ya.S. Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NASU (UA)
Bonchyk O. - Ya.S. Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NASU (UA)
Ubizskii S. - Lviv Polytechnic National University (UA)

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