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

Solskii, I.; Sugak, D.; Vakiv, M.

doi:10.12693/aphyspola.124.314

Cited by 30 publications

(11 citation statements)

References 21 publications

(14 reference statements)

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“…The studied Gd 3 Ga 5 O 12 crystals were grown in Scientific Research Company "Electron-Carat" by the Czochralski technique from iridium crucibles in the Ar+2%O 2 atmosphere by the technology described in [15]. The samples for experiments were cut from the same bulk crystal and have got the form of (i) cylinders with a diameter of 15 mm and a height of 7 mm and (ii) plates with dimensions of 7 × 15 × 1 mm 3 .…”

Section: Methodsmentioning

confidence: 99%

Investigation of Co Ions Diffusion in Gd₃Ga₅O₁₂ Single Crystals

et al. 2018

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Spatial changes of properties of Gd3Ga5O12 (GGG) single crystals caused by diffusion of cobalt ions during high-temperature annealing (1200 • C, 24 h) in Co3O4 powder are investigated. The registration of these changes was carried out by optical spectrophotometry, microscopy and micro-Raman scattering methods. Changes in structure of near-surface layers of the crystal were investigated by X-ray diffraction technique. It was shown that the additional absorption induced by annealing is related to intra-center optical transitions in Co 2+ ions, which occupy tetrahedral positions in the garnet structure at the distances of 250-500 µm from the crystal surface. The dependence of induced absorption with depth has got a non-monotonous character with a maximum at 400 µm. A comparison of the results obtained by different methods allows to suppose that the thermal treatment of GGG in the presence of cobalt ions leads to formation of the structurally and chemically non-uniform layer with a width about 500 µm.

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Section: Methodsmentioning

confidence: 99%

Investigation of Co Ions Diffusion in Gd₃Ga₅O₁₂ Single Crystals

et al. 2018

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“…LN single crystals with the congruent composition were grown in air by Czochralski technique at the SRC “Electron‐Carat.” Platinum crucibles were used for the crystal growth according to the technology described in ref. []. The single domain state of the crystals was ensured by an after‐growth high‐temperature treatment in electrical field.…”

Section: Methodsmentioning

confidence: 99%

“…Platinum crucibles were used for the crystal growth according to the technology described in ref. [28]. The single domain state of the crystals was ensured by an after-growth hightemperature treatment in electrical field.…”

Section: Methodsmentioning

confidence: 99%

Comparative Investigations of Nanohardness and Impurity Distribution Profiles of Lithium Niobate Single Crystals Diffusion Doped by Copper Ions

Sugak

Syvorotka

Yakhnevych

et al. 2019

Crystal Research and Technology

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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.

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“…Magnesium oxide was added to the melt of LiNbO 3 to prepare a doped crystal nominally containing 7 mol.% of MgO. The growth technology is described in details elsewhere [12][13][14]. The x-cut plates of LiNbO 3 and LiNbO 3 :MgO (7 mol.%) were prepared with the thickness of 1 mm.…”

Section: Methodsmentioning

confidence: 99%