Registration Number
0221U106608,
0121U112552
, R & D reports
Title
Cooperative kinetics of defects and domain structure in ferroelectrics
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Head
Morozovska Hanna М., Доктор фізико-математичних наук
Registration Date
15-12-2021
Organization
Institute of Physics of National Academy of Sciences of Ukraine
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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
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Budnyk Oksana Petrivna
Vainberg Viktor Volodymyrovych
Morozovska Hanna Мykolaivna
Fesenko Olena Maryanivna
Tsebrienko Tamara Viktorivna
Yaremkevych Andriy Dmytrovych
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2021-12-15
