Insight into the dynamics of low temperature dielectric relaxation of ordinary perovskite ferroelectrics
The temperature dependence of the dielectric response of ordinary ferroelectric materials exhibits a frequency-independent anomalous peak as a manifestation of the ferroelectric to paraelectric phase transition. A second anomaly in the permittivity has been reported in different ferroelectric perovs...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2017-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/aa91c8 |
| _version_ | 1797750548729954304 |
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| author | Rafael Levit Diego A Ochoa Julio C Martínez-García Jose E García |
| author_facet | Rafael Levit Diego A Ochoa Julio C Martínez-García Jose E García |
| author_sort | Rafael Levit |
| collection | DOAJ |
| description | The temperature dependence of the dielectric response of ordinary ferroelectric materials exhibits a frequency-independent anomalous peak as a manifestation of the ferroelectric to paraelectric phase transition. A second anomaly in the permittivity has been reported in different ferroelectric perovskite-type systems at low temperatures, often at cryogenic temperatures. This anomaly manifests as a frequency-dependent local maximum, which exhibits similar characteristics to that observed in relaxor ferroelectrics around their phase transition. The origin of this unexpected behavior is still controversial. In order to clarify this phenomenon, a model-free route solution is developed in this work. Our findings reveal the same critical linear pattern/glass-like freezing behavior previously observed for glass-forming systems. Contrary to current thought, our results suggest that a critical-like dynamic parameterization could provide a more appropriate solution than the conventional Vogel–Fulcher–Tammann equation. The implemented methodology may open a new pathway for analyzing relaxation phenomena in other functional materials like relaxor ferroics. |
| first_indexed | 2024-03-12T16:34:18Z |
| format | Article |
| id | doaj.art-48128123e1e14783985079fe79b3ee60 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:34:18Z |
| publishDate | 2017-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-48128123e1e14783985079fe79b3ee602023-08-08T14:56:49ZengIOP PublishingNew Journal of Physics1367-26302017-01-01191111301310.1088/1367-2630/aa91c8Insight into the dynamics of low temperature dielectric relaxation of ordinary perovskite ferroelectricsRafael Levit0https://orcid.org/0000-0002-0039-5933Diego A Ochoa1Julio C Martínez-García2Jose E García3https://orcid.org/0000-0002-1232-1739Department of Physics, Universitat Politécnica de Catalunya —BarcelonaTech, E-08034 Barcelona, SpainDepartment of Physics, Universitat Politécnica de Catalunya —BarcelonaTech, E-08034 Barcelona, SpainDepartment of Physics, Universitat Politécnica de Catalunya —BarcelonaTech, E-08034 Barcelona, SpainDepartment of Physics, Universitat Politécnica de Catalunya —BarcelonaTech, E-08034 Barcelona, SpainThe temperature dependence of the dielectric response of ordinary ferroelectric materials exhibits a frequency-independent anomalous peak as a manifestation of the ferroelectric to paraelectric phase transition. A second anomaly in the permittivity has been reported in different ferroelectric perovskite-type systems at low temperatures, often at cryogenic temperatures. This anomaly manifests as a frequency-dependent local maximum, which exhibits similar characteristics to that observed in relaxor ferroelectrics around their phase transition. The origin of this unexpected behavior is still controversial. In order to clarify this phenomenon, a model-free route solution is developed in this work. Our findings reveal the same critical linear pattern/glass-like freezing behavior previously observed for glass-forming systems. Contrary to current thought, our results suggest that a critical-like dynamic parameterization could provide a more appropriate solution than the conventional Vogel–Fulcher–Tammann equation. The implemented methodology may open a new pathway for analyzing relaxation phenomena in other functional materials like relaxor ferroics.https://doi.org/10.1088/1367-2630/aa91c8dielectric propertiesdielectric relaxationferroelectricssuper-Arrhenius behavior77.22.Gm77.22.Ch |
| spellingShingle | Rafael Levit Diego A Ochoa Julio C Martínez-García Jose E García Insight into the dynamics of low temperature dielectric relaxation of ordinary perovskite ferroelectrics New Journal of Physics dielectric properties dielectric relaxation ferroelectrics super-Arrhenius behavior 77.22.Gm 77.22.Ch |
| title | Insight into the dynamics of low temperature dielectric relaxation of ordinary perovskite ferroelectrics |
| title_full | Insight into the dynamics of low temperature dielectric relaxation of ordinary perovskite ferroelectrics |
| title_fullStr | Insight into the dynamics of low temperature dielectric relaxation of ordinary perovskite ferroelectrics |
| title_full_unstemmed | Insight into the dynamics of low temperature dielectric relaxation of ordinary perovskite ferroelectrics |
| title_short | Insight into the dynamics of low temperature dielectric relaxation of ordinary perovskite ferroelectrics |
| title_sort | insight into the dynamics of low temperature dielectric relaxation of ordinary perovskite ferroelectrics |
| topic | dielectric properties dielectric relaxation ferroelectrics super-Arrhenius behavior 77.22.Gm 77.22.Ch |
| url | https://doi.org/10.1088/1367-2630/aa91c8 |
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