Terahertz Probing Irreversible Phase Transitions Related to Polar Clusters in Bi0.5Na0.5TiO3‐Based Ferroelectric
Abstract Electric‐field‐induced phase transitions in Bi0.5Na0.5TiO3‐based relaxor ferroelectrics are essential to the control of their electrical properties and consequently in revolutionizing their dielectric and piezoelectric applications. However, fundamental understanding of these transitions is...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2020-04-01
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| Series: | Advanced Electronic Materials |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/aelm.201901373 |
| _version_ | 1797656111100198912 |
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| author | Jiyue Wu Wenfeng Sun Nan Meng Hangfeng Zhang Vladimir Koval Yan Zhang Robert Donnan Bin Yang Dou Zhang Haixue Yan |
| author_facet | Jiyue Wu Wenfeng Sun Nan Meng Hangfeng Zhang Vladimir Koval Yan Zhang Robert Donnan Bin Yang Dou Zhang Haixue Yan |
| author_sort | Jiyue Wu |
| collection | DOAJ |
| description | Abstract Electric‐field‐induced phase transitions in Bi0.5Na0.5TiO3‐based relaxor ferroelectrics are essential to the control of their electrical properties and consequently in revolutionizing their dielectric and piezoelectric applications. However, fundamental understanding of these transitions is a long‐standing challenge due to their complex crystal structures. Given the structural inhomogeneity at the nanoscale or sub‐nanoscale in these materials, dielectric response characterization based on terahertz (THz) electromagnetic‐probe beam fields is intrinsically coordinated to lattice dynamics during DC‐biased poling cycles. The complex permittivity reveals the field‐induced phase transitions to be irreversible. This profoundly counters the claim of reversibility, the conventional support for which is based upon the peak that is manifest in each of four quadrants of the current–field curves. The mechanism of this irreversibility is solely attributed to polar clusters in the transformed lattices. These represent an extrinsic factor, which is quiescent in the THz spectral domain. |
| first_indexed | 2024-03-11T17:24:37Z |
| format | Article |
| id | doaj.art-3ef5c7190ea843b6820ec75cea08a169 |
| institution | Directory Open Access Journal |
| issn | 2199-160X |
| language | English |
| last_indexed | 2024-03-11T17:24:37Z |
| publishDate | 2020-04-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Electronic Materials |
| spelling | doaj.art-3ef5c7190ea843b6820ec75cea08a1692023-10-19T05:02:13ZengWiley-VCHAdvanced Electronic Materials2199-160X2020-04-0164n/an/a10.1002/aelm.201901373Terahertz Probing Irreversible Phase Transitions Related to Polar Clusters in Bi0.5Na0.5TiO3‐Based FerroelectricJiyue Wu0Wenfeng Sun1Nan Meng2Hangfeng Zhang3Vladimir Koval4Yan Zhang5Robert Donnan6Bin Yang7Dou Zhang8Haixue Yan9School of Engineering and Materials Science Queen Mary University of London Mile End Road London E1 4NS UKDepartment of Physics Beijing Key Lab of Metamaterials and Devices and Key Laboratory of Terahertz Optoelectronics Ministry of Education Beijing Advanced Innovation Center for Imaging Technology Capital Normal University Beijing 100048 P. R. ChinaSchool of Engineering and Materials Science Queen Mary University of London Mile End Road London E1 4NS UKSchool of Engineering and Materials Science Queen Mary University of London Mile End Road London E1 4NS UKInstitute of Materials Research Slovak Academy of Sciences Watsonova 47 04001 Kosice SlovakiaDepartment of Physics Beijing Key Lab of Metamaterials and Devices and Key Laboratory of Terahertz Optoelectronics Ministry of Education Beijing Advanced Innovation Center for Imaging Technology Capital Normal University Beijing 100048 P. R. ChinaSchool of Electronic Engineering and Computer Science Queen Mary University of London London E1 4NS UKDepartment of Physics Beijing Key Lab of Metamaterials and Devices and Key Laboratory of Terahertz Optoelectronics Ministry of Education Beijing Advanced Innovation Center for Imaging Technology Capital Normal University Beijing 100048 P. R. ChinaState Key Laboratory of Powder Metallurgy Central South University Changsha Hunan 410083 ChinaSchool of Engineering and Materials Science Queen Mary University of London Mile End Road London E1 4NS UKAbstract Electric‐field‐induced phase transitions in Bi0.5Na0.5TiO3‐based relaxor ferroelectrics are essential to the control of their electrical properties and consequently in revolutionizing their dielectric and piezoelectric applications. However, fundamental understanding of these transitions is a long‐standing challenge due to their complex crystal structures. Given the structural inhomogeneity at the nanoscale or sub‐nanoscale in these materials, dielectric response characterization based on terahertz (THz) electromagnetic‐probe beam fields is intrinsically coordinated to lattice dynamics during DC‐biased poling cycles. The complex permittivity reveals the field‐induced phase transitions to be irreversible. This profoundly counters the claim of reversibility, the conventional support for which is based upon the peak that is manifest in each of four quadrants of the current–field curves. The mechanism of this irreversibility is solely attributed to polar clusters in the transformed lattices. These represent an extrinsic factor, which is quiescent in the THz spectral domain.https://doi.org/10.1002/aelm.201901373dielectricsphase transitionspolar clustersrelaxor ferroelectrics |
| spellingShingle | Jiyue Wu Wenfeng Sun Nan Meng Hangfeng Zhang Vladimir Koval Yan Zhang Robert Donnan Bin Yang Dou Zhang Haixue Yan Terahertz Probing Irreversible Phase Transitions Related to Polar Clusters in Bi0.5Na0.5TiO3‐Based Ferroelectric Advanced Electronic Materials dielectrics phase transitions polar clusters relaxor ferroelectrics |
| title | Terahertz Probing Irreversible Phase Transitions Related to Polar Clusters in Bi0.5Na0.5TiO3‐Based Ferroelectric |
| title_full | Terahertz Probing Irreversible Phase Transitions Related to Polar Clusters in Bi0.5Na0.5TiO3‐Based Ferroelectric |
| title_fullStr | Terahertz Probing Irreversible Phase Transitions Related to Polar Clusters in Bi0.5Na0.5TiO3‐Based Ferroelectric |
| title_full_unstemmed | Terahertz Probing Irreversible Phase Transitions Related to Polar Clusters in Bi0.5Na0.5TiO3‐Based Ferroelectric |
| title_short | Terahertz Probing Irreversible Phase Transitions Related to Polar Clusters in Bi0.5Na0.5TiO3‐Based Ferroelectric |
| title_sort | terahertz probing irreversible phase transitions related to polar clusters in bi0 5na0 5tio3 based ferroelectric |
| topic | dielectrics phase transitions polar clusters relaxor ferroelectrics |
| url | https://doi.org/10.1002/aelm.201901373 |
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