Features of the dynamic pyroelectric response and the local domain structure in PZN-PT crystals
- Autores: Kislova I.L.1, Kiselev D.A.2, Kholkin A.L.3,4, Solnyshkin A.V.1, Mukhin O.A.1, Kolkov G.G.1
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Afiliações:
- Tver State University
- National University of Science and Technology MISIS
- Aveiro Institute of Materials
- University of Latvia
- Edição: Nº 16 (2024)
- Páginas: 171-182
- Seção: Experimental studies of nanoparticles, nanosystems and nanomaterials
- URL: https://journals.rcsi.science/2226-4442/article/view/319424
- DOI: https://doi.org/10.26456/pcascnn/2024.16.171
- EDN: https://elibrary.ru/FAPKCV
- ID: 319424
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Resumo
In this work, the polarization distribution over the volume of (1-x)Pb(Zn1/3Nb2/3)O3-xPbTiO3 crystals of the directions [001] and [111] was studied by the method of dynamic pyroelectric response. It is established that the value of the pyroelectric coefficient in the samples of both directions is the same. The domain structure of the studied crystals was visualized by piezoresponse force microscopy. It is shown that on the surface of the initial single crystals of these directions there is a small-sized labyrinth-like domain structure from 50 to 500 nm, characteristic of ferroelectric relaxors. At a depth of 50 microns from the crystal surface, a larger domain structure with a characteristic micron-scale domain size is observed. To determine the average thickness of a layer with an inhomogeneous polarization distribution, a theoretical model was used that analytically describes the possibilities of a dynamic pyroelectric method for studying the near-surface layer of ferroelectric materials. Theoretical calculations have shown that this method allows us to obtain accurate data on the thickness of the layer and its polarization state. It has been experimentally established that in a single crystal 0,955Pb(Zn1/3Nb2/3)O3-0,045PbTiO3 of the direction [001], the secondary pyroelectric effect contributes to the overall pyroelectric response much more than for the direction [111] due to the large value of the piezoelectric coefficient.
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Sobre autores
Inna Kislova
Tver State University
Email: inkis@mail.ru
Ph. D., Docent, Applied Physic Department
Dmitry Kiselev
National University of Science and Technology MISISPh. D, Head of the Laboratory of Physics of Oxide Ferroelectrics of the Department of Materials Science of Semiconductors and Dielectrics
Andrei Kholkin
Aveiro Institute of Materials; University of LatviaPh. D., Researcher, Department of Physics, Aveiro Institute of Materials; Researcher, Institute of Solid-State Physics, University of Latvia
Alexander Solnyshkin
Tver State UniversityDr. Sc., Full Professor, Condensed Matter Physics Department
Oleg Mukhin
Tver State Universitystudent of Faculty of Physics and Technology
Georgij Kolkov
Tver State Universitystudent of Faculty of Physics and Technology
Bibliografia
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