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Journal article
Defect-induced, Ferroelectric-like Switching and Adjustable Dielectric Tunability in Antiferroelectrics
Advanced materials (Weinheim), e2300257
15 Mar 2023
PMID: 36919926
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Antiferroelectrics, which undergo a field-induced phase transition to ferroelectric order that manifests as double-hysteresis polarization switching, exhibit great potential for dielectric, electromechanical, and electrothermal applications. Compared to their ferroelectric cousins, however, considerably fewer efforts have been made to understand and control antiferroelectrics. Here, it is demonstrated that the polarization switching behavior of an antiferroelectric can be strongly influenced and effectively regulated by point defects. In films of the canonical antiferroelectric PbZrO
, decreasing oxygen pressure during deposition (and thus increasing adatom kinetic energy) causes unexpected "ferroelectric-like" polarization switching although the films remain in the expected antiferroelectric orthorhombic phase. This "ferroelectric-like" switching is correlated with the creation of bombardment-induced point-defect complexes which pin the antiferroelectric-ferroelectric phase boundaries, and thus effectively delay the phase transition under changing field. The effective pinning energy is extracted via temperature-dependent switching-kinetics studies. In turn, by controlling the concentration of defect complexes, the dielectric tunability of the PbZrO
can be adjusted, including being able to convert between "positive" and "negative" tunability near zero field. This work reveals the important role and strong capability of defects to engineer antiferroelectrics for new performance and functionalities. This article is protected by copyright. All rights reserved.
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Details
- Title
- Defect-induced, Ferroelectric-like Switching and Adjustable Dielectric Tunability in Antiferroelectrics
- Creators
- Hao Pan - University of California, BerkeleyZishen Tian - University of California, BerkeleyMegha Acharya - University of California, BerkeleyXiaoxi Huang - University of California, BerkeleyPravin Kavle - University of California, BerkeleyHongrui Zhang - University of California, BerkeleyLiyan Wu - Drexel UniversityDongfang Chen - Drexel UniversityJohn Carroll - DEVCOM Army Research LaboratoryRobert Scales - Drexel UniversityCedric J G Meyers - Drexel UniversityKathleen Coleman - DEVCOM Army Research LaboratoryBrendan Hanrahan - DEVCOM Army Research LaboratoryJonathan E Spanier - Drexel UniversityLane W Martin - University of California, Berkeley
- Publication Details
- Advanced materials (Weinheim), e2300257
- Publisher
- Wiley
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000979909000001
- Scopus ID
- 2-s2.0-85154623746
- Other Identifier
- 991020221917304721
UN Sustainable Development Goals (SDGs)
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter