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Optical anomalies and residual stresses in basal-plane-faceted ribbons of Stepanov-grown sapphire crystals

  • Defects and Impurity Centers, Dislocations, and Physics of Strength
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Abstract

The effects of an anomalous biaxiality and a residual-stress field in basal-plane-faceted single-crystal sapphire ribbons were studied by an optical polarization method using a conoscopic light beam. Formulas that relate the difference between the principal stresses to the angle of optical-axis divergence are obtained. It is shown that the central regions of the ribbons undergo compressive stresses whereas their edges undergo tensile stresses. As compared to block-free ribbons, the stresses in block-containing ribbons increase more intensely with distance from the seed.

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Authors and Affiliations

  1. St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199003, Russia

    A. V. Denisov & Yu. O. Punin

  2. Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia

    V. M. Krymov

Authors
  1. A. V. Denisov
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  2. V. M. Krymov
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  3. Yu. O. Punin
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Additional information

Original Russian Text © A.V. Denisov, V.M. Krymov, Yu O. Punin, 2007, published in Fizika Tverdogo Tela, 2007, Vol. 49, No. 3, pp. 454–459.

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Denisov, A.V., Krymov, V.M. & Punin, Y.O. Optical anomalies and residual stresses in basal-plane-faceted ribbons of Stepanov-grown sapphire crystals. Phys. Solid State 49, 472–477 (2007). https://doi.org/10.1134/S1063783407030146

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  • DOI: https://doi.org/10.1134/S1063783407030146

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