Polarization reversal by tip of scanning probe microscope in SBN

We present the results of experimental study of the influence of initial domain state on the shape and size of isolated domains created by the conductive tip of scanning probe microscope during local polarization reversal in relaxor ferroelectric strontium barium niobate doped with nickel and cerium. The domain radius was found to increase with increasing voltage and time and depend on the initial polarization direction. Circular domains of the opposite sign were found to appear due to polarization backswitching. The obtained results can be used for practical applications of domain and domain wall engineering in ferroelectrics

Tip-induced domain growth in the non-polar cuts of SBN:Ce single crystals

The local switching by conductive tip of scanning probe microscope was studied in the non-polar cuts of Ce-doped Sr0.61Ba0.39Nb2O6 single crystals after creation of the single-domain state. The switched domains possessed the egg-shaped heads and wedge-like tails. The dependences of lengths of the domain head and tail and width of the domain head on the voltage and pulse duration were derived. The start voltage for growth of the domain tail was revealed. The fast relaxation of the domain head and slow relaxation of the domain tail were observed. The model of the forward domain growth by step generation and kink motion was used for explanation of the experimental results. The obtained knowledge can be used for the domain engineering in ferroelectrics. © Published under licence by IOP Publishing Ltd.Russian Science Foundation, RSF: 19-72-00008The equipment of the Ural Centre for Shared Use “Modern nanotechnology” Ural Federal University was used. The research was made possible by the Russian Science Foundation (grant № 19-72-00008)

Study of nanodomain shape in the bulk of relaxor ferroelectrics: SBN single crystal and PLZT ceramics

Проведено исследование формы сегнетоэлектрических доменов в приповерхностном объеме монокристаллов S N и PLZT-керамики методами силовой микроскопии пьезоотклика и сканирующей электронной микроскопии.We have studied initial nanodomain structures in the bulk of relaxor SBN single crystals and PLZT ceramics by domain visualization using piezoresponse force microscopy (PFM) and scanning electron microscopy (SEM).Работа выполнена с использованием оборудования УЦКП «Современные нанотехнологии» УрФУ при финансовой поддержке РФФИ (грант 16-02-00821 - а)

Influence of the domain structure on piezoelectric and dielectric properties of relaxor SBN single crystals

We have studied the influence of initial domain structure on piezoelectric and dielectric properties of Sr 0.61 Ba 0.39 Nb 2 O 6 single crystals slightly doped with Ce and Ni. Initial domain structure was created by zero-field cooling, in-field cooling, and partial switching. The difference in the frequency dependences of macroscopic piezoelectric response and temperature dependences of dielectric permittivity for various initial domain structures was revealed. © 2018 Institute of Physics Publishing. All rights reserved.Equipment of the Ural Centre for Shared Use “Modern nanotechnology” Ural Federal University was used. The research was made possible by Russian Foundation of Basic Research (project № 16-02- 00821-а) and state task of Ministry of education and science of the Russian Federation (No. 3.4993.2017/6.7). The work was partially supported by Government of the Russian Federation (act 211, agreement 02.A03.21.0006). Part of this work was developed within the scope of the project CICECO-Aveiro Institute of Materials, POCI-01-0145-FEDER-007679 (FCT Ref. UID /CTM /50011/2013), financed by national funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement.et al.;NT-MDT Spectrum Instruments;Ostec-ArtTool Ltd.;Promenergolab LLC;Russian Foundation for Basic Research;Taylor and Francis Grou