Structure and Optical Characteristics of Barium–Strontium Niobate Films on Al2O3 Substrates
Tóm tắt
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.
Tài liệu tham khảo
K. A. Vorotilov, V. M. Mukhortov, and A. S. Sigov, Integrated Ferroelectric Devices (Energoatomizdat, Moscow, 2011) [in Russian].
E. G. Fesenko, A Perovskite Family and Ferroelectricity (Atomizdat, Moscow, 1972) [in Russian].
V. M. Mukhortov, Yu. I. Golovko, S. V. Biryukov, A. Anokhin, and Yu. I. Yuzyuk, Tech. Phys. 61, 91 (2016). https://doi.org/10.1134/S106378421601014X
Yu. S. Kuz’minov, Ferroelectric Crystals for Controlling Laser Radiation (Nauka, Moscow, 1982) [in Russian].
J. Koo, E. Kang, and B. Bae, J. Korean Phys. Soc. 42, 1161 (2003).
A. P. Kovtun, S. P. Zinchenko, A. V. Pavlenko, and G. N. Tolmachev, Tech. Phys. Lett. 42, 577 (2016).
G. N. Tolmachev, A. P. Kovtun, I. N. Zakharchenko, I. M. Aliev, A. V. Pavlenko, L. A. Reznichenko, and I. A. Verbenko, Phys. Solid State 57, 2106 (2015). https://doi.org/10.1134/S1063783415100339
A. V. Pavlenko, I. N. Zakharchenko, A. S. Anokhin, Yu. A. Kuprina, L. I. Kiseleva, and Yu. I. Yuzyuk, Phys. Solid State 59, 909 (2017). https://doi.org/10.1134/S1063783417050249
V. A. Gritskikh, I. V. Zhikharev, S. V. Kara-Murza, N. V. Korchikova, Yu. M. Nikolaenko, and A. A. Tikhii, in Proceedings of the 7th International Symposium on Physics of Surface Phenomena, Interphase Boundaries and Phase Transitions, 2017, No. 7, p. 53.
D. Kip, S. Aulkemeyer, K. Buse, F. Mersch, R. Pankrath, and E. Krätzig, Phys. Status Solidi A 154 (2), K5 (1996). https://doi.org/10.1002/pssa.2211540235
P. V. Lenzo, E. C. Spencer, and A. A. Ballman, Appl. Phys. Lett. 11, 23 (1967). https://doi.org/10.1063/1.1754944
A. A. Tikhii, V. A. Gritskikh, S. V. Kara-Murza, N. V. Korchikova, Yu. M. Nikolaenko, V. V. Faraponov, and I. V. Zhikharev, Opt. Spectrosc. 119, 268 (2015). https://doi.org/10.1134/S0030400X15080238
L. A. Golovan, V. Yu. Timoshenko, and P. K. Kashkarov, Phys. Usp. 50, 595 (2007). https://doi.org/10.1070/PU2007v050n06ABEH006257