Floating zone growth of high-quality SrTiO3 single crystals

Strontium titanate single crystals 15-20 mm in diameter and 40-80 mm in length were grown by a floating zone method with radiation heating. Additional crystal heating just below the molten zone by an in-growth annealing furnace was applied in order to lower the temperature gradients and to achieve s...

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Bibliographic Details
Published in:Journal of crystal growth 2003-04, Vol.250 (3-4), p.397-404
Main Authors: Nabokin, P.I., Souptel, D., Balbashov, A.M.
Format: Article
Language:English
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Summary:Strontium titanate single crystals 15-20 mm in diameter and 40-80 mm in length were grown by a floating zone method with radiation heating. Additional crystal heating just below the molten zone by an in-growth annealing furnace was applied in order to lower the temperature gradients and to achieve slower cooling of the grown crystal. The crystal perfection was studied with X-ray topography and double-crystal diffractometry. The most perfect crystals were grown in [0 0 1] direction with single grain rocking curve widths of about 30' and subgrain misorientations of 1'-3' over 10 x 10mm2 areas of the boule cross-section for both (0 0 1)-, (1 1 0)- and (1 1 1)-oriented slices. Such high-quality crystal can be grown reproducibly with starting materials of 4N grade quality.
ISSN:0022-0248
DOI:10.1016/S0022-0248(02)02391-6