Features of Polarization of Langmuir Films of Barium Titanate Under Electric Influence
https://doi.org/10.21869/2223-1528-2022-12-1-174-189
Abstract
Purpose of research. Form a film structure from the BaTiO3 colloidal system by the Langmuir-Blodgett method and characterize its polarization properties using modern nanoinstrumental methods.
Methods. Determination of the chemical structure by Raman light scattering; study of film polarization on a scanning probe microscope in the Kelvin probe microscopy mode.
Results. From a colloidal system of stabilized barium titanate nanoparticles, Langmuir–Blodgett multilayer film structures were obtained. Their chemical structure was confirmed by the method of Raman (Raman) light scattering: lines corresponding to both the tetragonal and cubic structures of barium titanate were observed, and lines caused by transverse and longitudinal optical vibrations were also found. The values of the coercive fields (624 and 1056 kV/cm) and the displacement field (216.5 kV/cm) were determined from the dielectric hysteresis. The polarization of a barium titanate nanofilm on a glass substrate with a platinum sublayer was studied by the contrast of shades in images obtained by Kelvin probe microscopy. It has been shown that platinum is the most preferable substrate material that enhances polarization. Sequential recording of areas in the form of squares (information pits) was performed at a positive and then at a negative voltage, from which the functional dependence of the residual polarization on voltage was established.
Conclusion. The Langmuir-Blodgett method makes it possible to form film structures from barium titanate nanoparticles and study their polarization properties. Using the Kelvin probe microscopy, it was possible to polarize the films with voltages of different signs and to analyze the profiles of the obtained contrast images with different polarizations on an atomic force microscope: 50:1 and 600:1 for light and dark areas, respectively.
About the Authors
A. P. KuzmenkoRussian Federation
Alexander P. Kuzmenko, Dr. of Sci. (Physics and Mathematics), Professor, Chief Researcher of the Regional Center for Nanotechnology
50 Let Oktyabrya str. 94, Kursk 305040
I. V. Loktionova
Russian Federation
Inna V. Loktionova, Cand. of Sci. (Physics and Mathematics), Senior Researcher of the Regional Center for Nanotechnology
50 Let Oktyabrya str. 94, Kursk 305040
P. V. Abakumov
Russian Federation
Pavel V. Abakumov, Cand. of Sci. (Physics and Mathematics), Senior Researcher of the Regional Center for Nanotechnology
50 Let Oktyabrya str. 94, Kursk 305040
E. A. Novikov
Russian Federation
Evgeny A. Novikov, Junior Researcher of the Regional Center for Nanotechnology
50 Let Oktyabrya str. 94, Kursk 305040
A. S. Sizov
Russian Federation
Alexander S. Sizov, Dr. of Sci. (Physics and Mathematics), Professor
50 Let Oktyabrya str. 94, Kursk 305040
A. V. Kuzko
Russian Federation
Anna V. Kuzko, Dr. of Sci. (Physics and Mathematics), Associate Professor of the Department of Nanotechnology, General and Applied Physics
50 Let Oktyabrya str. 94, Kursk 305040
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Review
For citations:
Kuzmenko A.P., Loktionova I.V., Abakumov P.V., Novikov E.A., Sizov A.S., Kuzko A.V. Features of Polarization of Langmuir Films of Barium Titanate Under Electric Influence. Proceedings of the Southwest State University. Series: Engineering and Technology. 2022;12(1):174-189. (In Russ.) https://doi.org/10.21869/2223-1528-2022-12-1-174-189