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3 Acta Physica Polonica A

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Growing Large Size Complex Oxide Single Crystals by Czochralski Technique for Electronic Devices

100%

Solskii I. , Sugak D. , Vakiv M.

Acta Physica Polonica A

2013

tom 124

nr 2

314-320

This paper is devoted to the use and further development of the single crystal growing technique invented by Professor Jan Czochralski (1885-1953). The possibilities of the Czochralski technique are demonstrated. Further improvements were introduced at the Scientific Research Company "Carat" (Lviv, Ukraine) to grow large size complex oxide single crystals. The paper presents an overview of some single crystals grown with the use of a modified technology. Growth parameters and properties of resulting crystals are summarized to show a high potential of the Czochralski technique as an industrial technology to grow large-size, high quality, and structurally perfect single crystals of complex oxides.

NMR Analysis of Mg Ion Localization in LiNbO_{3} Crystal

100%

Yatsenko A. , Yevdokimov S. , Sugak D. , Solskii I.

tom 117

nr 1

166-169

The analysis of cation sublattices population in magnesium doped LiNbO_{3} crystals is carried out. It is shown that volume concentration of lithium vacancies (V_{Li}) monotonously increases with increasing of MgO content in the crystal up to the threshold value. A series of LiNbO_{3} crystals with various concentration of Mg^{2+} were investigated by ^{7}Li and ^{93}Nb Nuclear Magnetic Resonance (NMR). It is concluded that the peculiarities of NMR spectra in Mg-doped LiNbO_{3} crystals can be explained by the formation of defect complexes including Mg_{Li} ions and V_{Li} on the shortest distances between them.

Influence of the γ-Radiation on the Generation Characteristics of the YAlO_{3}:Nd Crystals

63%

Sugak D. , Matkovskii A. , Grabovskii V. , Prokhorenko V. , Suchocki A. , Durygin A. , Solskii I. , Shakhov A.

Acta Physica Polonica A

1998

tom 93

nr 4

643-648

The results of investigation of the influence of γ-radiation by ^{60}Co-source on the YAlO_{3}:Nd laser generation characteristics are presented in this paper. The significant decrease in the output energy after γ-irradiation was obtained. The energetic characteristics are restored after illumination of the γ-irradiated laser rods by 1000-10000 pulses of the pumping lamp light. The additional absorption spectrum is induced by γ-irradiation in the crystals. The nature of the created in this way colour centres is discussed. The mechanism of influence of the colour centres on generation properties of the crystals is discussed.