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Information × Registration Number 0221U106608, 0121U112552 , R & D reports Title Cooperative kinetics of defects and domain structure in ferroelectrics popup.stage_title Head Morozovska Hanna М., Доктор фізико-математичних наук Registration Date 15-12-2021 Organization Institute of Physics of National Academy of Sciences of Ukraine popup.description2 Research object - ferroelectrics with mobile ionic and electronic charge carriers. Research subject - main features of formation and cooperative evolution of domain structures. Purpose of work - establishment of the main features of the formation and cooperative evolution of domain structures in ferroelectrics with mobile ionic and electronic charge carriers (bulk and / or surface). Research methods. Landau-Ginzburg-Devonshire (LGD) phenomenological approach, elasticity theory, electrodynamics and semiconductor theory are used to describe the polar and electronic properties of the ferroelectrics with mobile defects. Infrared (IR) and Raman spectroscopy, measurements of charge transfer phenomena are used for experimental studies of polar, structural and charge transport properties of ferroelectrics. Results: The influence of flexoelectric and electrostriction coupling, temperature and size effects on the dynamics of the domain structure in thin ferroelectric films with charged defects. The influence of spontaneous polarization screening on the cooperative dynamics of charged defects and domain structure in thin films of ferroelectric and anti-ferroelectrics is established. The method of preparation of different types of ferroelectrics for measuring their Raman scattering and IR absorption spectra has been developed. The analysis of Raman scattering spectra of ferroelectric samples with impurities and defects for characterization of samples is carried out The method of measuring the characteristics of charge transfer phenomena in ferroelectrics with photoactive impurities and charged defects has been developed The role of cooperative phenomena in the characteristics of the studied materials is established on the basis of experimentally determined features of the charge transfer phenomena and electrochemical reversal of polarization of ferroelectrics and antiferroelectrics. Product Description popup.authors Budnyk Oksana Petrivna Vainberg Viktor Volodymyrovych Morozovska Hanna Мykolaivna Fesenko Olena Maryanivna Tsebrienko Tamara Viktorivna Yaremkevych Andriy Dmytrovych popup.nrat_date 2021-12-15 Close