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Structure and Optical Characteristics of Barium–Strontium Niobate Films on Al2O3 Substrates

  • OPTICS OF LOW-DIMENSIONAL STRUCTURES, MESOSTRUCTURES, AND METAMATERIALS
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Abstract

The structure and optical characteristics of thin films of relaxor ferroelectric Ba0.5Sr0.5Nb2O6 grown by RF sputtering in an oxygen atmosphere on an Al2O3 substrate (c cut) have been studied. X-ray diffraction analysis shows that Ba0.5Sr0.5Nb2O6 films are c-oriented and unit-cell parameter c is 3.948(1) Å. Ellipsometric measurements confirm that SBN-50 films are characterized by a natural growth direction, which coincides with the direction of the optical crystal axis. An analysis of ellipsometric results shows that there is no transition layer at the film/substrate interface; the damaged layer on the free film surface is 7.5 nm thick, and the volume filling factor is estimated to be 0.625.

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FUNDING

This study was performed within the framework of a state contract of the Southern Scientific Centre, Russian Academy of Sciences, Russian Academy of Sciences (project no. 0120-1354-247) and a state contract of the Ministry of Education and Science of the Russian Federation (project no. 3.6371.2017/8.9) and supported by the Russian Foundation for Basic Research (project no. 16-29-14013).

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Authors and Affiliations

  1. Southern Scientific Center, Russian Academy of Sciences, 344006, Rostov-on-Don, Russia

    A. V. Pavlenko, D. V. Stryukov & N. V. Kovtun

  2. Research Institute of Physics, Southern Federal University, 344090, Rostov-on-Don, Russia

    A. V. Pavlenko

  3. Luhansk Taras Shevchenko National University, 91011, Luhansk, Ukraine

    S. V. Kara-Murza, A. P. Korchikova & A. A. Tikhii

Authors
  1. A. V. Pavlenko
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  2. S. V. Kara-Murza
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  3. A. P. Korchikova
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  4. A. A. Tikhii
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  5. D. V. Stryukov
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  6. N. V. Kovtun
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Corresponding author

Correspondence to A. V. Pavlenko.

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Translated by A. Sin’kov

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Pavlenko, A.V., Kara-Murza, S.V., Korchikova, A.P. et al. Structure and Optical Characteristics of Barium–Strontium Niobate Films on Al2O3 Substrates. Opt. Spectrosc. 126, 487–491 (2019). https://doi.org/10.1134/S0030400X19050229

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  • DOI: https://doi.org/10.1134/S0030400X19050229

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