Anomalous behaviour of dynamic electrical conductivity in semiconductor ferroelectric ceramics near the phase transition temperature
The article presents the results of a study of the electrical properties of semiconductor perovskite ceramics based on a solid solution of barium-strontium titanate with the addition of the rare earth element of cerium with the initial formula Ba1–x–y SrxCeyTiO3 (x = 0.05, y = 0.003). A scanning ele...
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| Format: | Article |
| Language: | English |
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Voronezh State University
2021-06-01
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| Series: | Конденсированные среды и межфазные границы |
| Subjects: | |
| Online Access: | https://journals.vsu.ru/kcmf/article/view/3431 |
| _version_ | 1819146615375527936 |
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| author | Gevorg S. Grigoryan Alexander M. Solodukha |
| author_facet | Gevorg S. Grigoryan Alexander M. Solodukha |
| author_sort | Gevorg S. Grigoryan |
| collection | DOAJ |
| description | The article presents the results of a study of the electrical properties of semiconductor perovskite ceramics based on a solid solution of barium-strontium titanate with the addition of the rare earth element of cerium with the initial formula Ba1–x–y SrxCeyTiO3 (x = 0.05, y = 0.003). A scanning electron microscope was used to obtain images of the sample surfaces and the elemental composition data. The measurements were performed by impedance spectroscopy in the temperature range of 348-385 K in the frequency range of 102–106 Hz using an LCR metre. It was found that there is an anomalous behaviour in the dynamic electrical conductivity of the samples in the temperature range close to the ferroelectricparaelectric
phase transition. This is expressed by a decrease in the value of the real part of the dynamic conductivity with
an increase in frequency. An analysis of the simplified equivalent circuit of the intergranular barrier showed that this anomaly can be explained by introducing an inductive element into the circuit. This element can be considered a “negative capacitance element”. Following the results of the study, a conclusion was made about the generalised character of the phenomenon |
| first_indexed | 2024-12-22T13:16:44Z |
| format | Article |
| id | doaj.art-35f04d2a72074e50935375ab57fe8d50 |
| institution | Directory Open Access Journal |
| issn | 1606-867X |
| language | English |
| last_indexed | 2024-12-22T13:16:44Z |
| publishDate | 2021-06-01 |
| publisher | Voronezh State University |
| record_format | Article |
| series | Конденсированные среды и межфазные границы |
| spelling | doaj.art-35f04d2a72074e50935375ab57fe8d502022-12-21T18:24:34ZengVoronezh State UniversityКонденсированные среды и межфазные границы1606-867X2021-06-0123210.17308/kcmf.2021.23/3431Anomalous behaviour of dynamic electrical conductivity in semiconductor ferroelectric ceramics near the phase transition temperatureGevorg S. Grigoryan0https://orcid.org/0000-0002-9850-8341Alexander M. Solodukha1https://orcid.org/0000-0002-4373-3883Voronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation PhD in Physics and Mathematics, Department of Experimental Physics, Voronezh State University, Voronezh, Russian FederationVoronezh State University, 1 Universitetskaya pl., Voronezh 394018, Russian Federation DSc in Physics and Mathematics, Professor at the Department of Experimental Physics, Voronezh State University, Voronezh, Russian FederationThe article presents the results of a study of the electrical properties of semiconductor perovskite ceramics based on a solid solution of barium-strontium titanate with the addition of the rare earth element of cerium with the initial formula Ba1–x–y SrxCeyTiO3 (x = 0.05, y = 0.003). A scanning electron microscope was used to obtain images of the sample surfaces and the elemental composition data. The measurements were performed by impedance spectroscopy in the temperature range of 348-385 K in the frequency range of 102–106 Hz using an LCR metre. It was found that there is an anomalous behaviour in the dynamic electrical conductivity of the samples in the temperature range close to the ferroelectricparaelectric phase transition. This is expressed by a decrease in the value of the real part of the dynamic conductivity with an increase in frequency. An analysis of the simplified equivalent circuit of the intergranular barrier showed that this anomaly can be explained by introducing an inductive element into the circuit. This element can be considered a “negative capacitance element”. Following the results of the study, a conclusion was made about the generalised character of the phenomenonhttps://journals.vsu.ru/kcmf/article/view/3431semiconductor ceramicsimpedance spectroscopynegative capacitance effectposistor |
| spellingShingle | Gevorg S. Grigoryan Alexander M. Solodukha Anomalous behaviour of dynamic electrical conductivity in semiconductor ferroelectric ceramics near the phase transition temperature Конденсированные среды и межфазные границы semiconductor ceramics impedance spectroscopy negative capacitance effect posistor |
| title | Anomalous behaviour of dynamic electrical conductivity in semiconductor ferroelectric ceramics near the phase transition temperature |
| title_full | Anomalous behaviour of dynamic electrical conductivity in semiconductor ferroelectric ceramics near the phase transition temperature |
| title_fullStr | Anomalous behaviour of dynamic electrical conductivity in semiconductor ferroelectric ceramics near the phase transition temperature |
| title_full_unstemmed | Anomalous behaviour of dynamic electrical conductivity in semiconductor ferroelectric ceramics near the phase transition temperature |
| title_short | Anomalous behaviour of dynamic electrical conductivity in semiconductor ferroelectric ceramics near the phase transition temperature |
| title_sort | anomalous behaviour of dynamic electrical conductivity in semiconductor ferroelectric ceramics near the phase transition temperature |
| topic | semiconductor ceramics impedance spectroscopy negative capacitance effect posistor |
| url | https://journals.vsu.ru/kcmf/article/view/3431 |
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