Anomalous Behavior of the Dielectric and Pyroelectric Responses of Ferroelectric Fine-Grained Ceramics
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| Autores principales: | , , , , , , , , , , , , , , |
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| Formato: | Preprint |
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2024
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| author | Pylypchuk, Oleksandr S. Ivanchenko, Serhii E. Yelisieiev, Mykola Y. Nikolenko, Andrii S. Styopkin, Victor I. Pokhylko, Bohdan Kushnir, Vladyslav Stetsenko, Denis O. Bereznykov, Oleksii Leschenko, Oksana V. Eliseev, Eugene A. Poroshin, Vladimir N. Morozovsky, Nicholas V. Vainberg, Victor V. Morozovska, Anna N. |
| author_facet | Pylypchuk, Oleksandr S. Ivanchenko, Serhii E. Yelisieiev, Mykola Y. Nikolenko, Andrii S. Styopkin, Victor I. Pokhylko, Bohdan Kushnir, Vladyslav Stetsenko, Denis O. Bereznykov, Oleksii Leschenko, Oksana V. Eliseev, Eugene A. Poroshin, Vladimir N. Morozovsky, Nicholas V. Vainberg, Victor V. Morozovska, Anna N. |
| contents | We revealed the anomalous temperature behavior of the giant dielectric permittivity and unusual frequency dependences of the pyroelectric response of the fine-grained ceramics prepared by the spark plasma sintering of the ferroelectric BaTiO3 nanoparticles. The temperature dependences of the electro-resistivity indicate the frequency-dependent transition in the electro-transport mechanisms between the lower and higher conductivity states accompanied by the maximum in the temperature dependence of the loss angle tangent. The pyroelectric thermal-wave probing revealed the existence of the spatially inhomogeneous counter-polarized ferroelectric state at the opposite surfaces of the ceramic sample. We described the temperature behavior of the giant dielectric response and losses using the core-shell model for ceramic grains, effective medium approach and Maxwell-Wagner approach. The superparaelectric-like state with a giant dielectric response may appear due to the internal barrier-layer capacitance effect, while the step-like thermal activation of localized polarons in the semiconducting grains is not excluded. The elucidation of the state microscopic origin requires measurements in the frequency range above 1 MHz. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_01108 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Anomalous Behavior of the Dielectric and Pyroelectric Responses of Ferroelectric Fine-Grained Ceramics Pylypchuk, Oleksandr S. Ivanchenko, Serhii E. Yelisieiev, Mykola Y. Nikolenko, Andrii S. Styopkin, Victor I. Pokhylko, Bohdan Kushnir, Vladyslav Stetsenko, Denis O. Bereznykov, Oleksii Leschenko, Oksana V. Eliseev, Eugene A. Poroshin, Vladimir N. Morozovsky, Nicholas V. Vainberg, Victor V. Morozovska, Anna N. Materials Science Applied Physics We revealed the anomalous temperature behavior of the giant dielectric permittivity and unusual frequency dependences of the pyroelectric response of the fine-grained ceramics prepared by the spark plasma sintering of the ferroelectric BaTiO3 nanoparticles. The temperature dependences of the electro-resistivity indicate the frequency-dependent transition in the electro-transport mechanisms between the lower and higher conductivity states accompanied by the maximum in the temperature dependence of the loss angle tangent. The pyroelectric thermal-wave probing revealed the existence of the spatially inhomogeneous counter-polarized ferroelectric state at the opposite surfaces of the ceramic sample. We described the temperature behavior of the giant dielectric response and losses using the core-shell model for ceramic grains, effective medium approach and Maxwell-Wagner approach. The superparaelectric-like state with a giant dielectric response may appear due to the internal barrier-layer capacitance effect, while the step-like thermal activation of localized polarons in the semiconducting grains is not excluded. The elucidation of the state microscopic origin requires measurements in the frequency range above 1 MHz. |
| title | Anomalous Behavior of the Dielectric and Pyroelectric Responses of Ferroelectric Fine-Grained Ceramics |
| topic | Materials Science Applied Physics |
| url | https://arxiv.org/abs/2407.01108 |