Journal article
Highly Tunable Relaxors Developed from Antiferroelectrics
Advanced materials (Weinheim), v 37(32), 2505376
01 Aug 2025
PMID: 40437904
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Highly responsive, voltage-tunable dielectrics are essential for microwave-telecommunication electronics. Ferroelectric/relaxor materials have been leading candidates for such functionality and have exhibited agile dielectric responses. Here, it is demonstrated that relaxor materials developed from antiferroelectrics can achieve both ultrahigh dielectric response and tunability. The system, based on alloying the archetypal antiferroelectric PbZrO3 with the dielectric BaZrO3, exhibits a more complex phase evolution than that in traditional relaxors and is characterized by an unconventional multi-phase competition between antiferroelectric, ferroelectric, and paraelectric order. This interplay of phases can greatly enhance the local heterogeneities and results in relaxor characteristics while preserving considerable polarizability. Upon studying Pb1-xBaxZrO3 for x = 0-0.45, Pb0.65Ba0.35ZrO3 is found to provide for exceptional dielectric tunability under low bias fields (approximate to 81% at 200 kV cm(-1) and approximate to 91% at 500 kV cm(-1)) at 10 kHz, outcompeting most traditional relaxor ferroelectric films. This high tunability is sustained in the radio-frequency range, resulting in a high commutation quality factor (>2000 at 1 GHz). This work highlights the phase evolution from antiferroelectrics (with lower, "positive" dielectric tunability) to relaxors (with higher, "negative" tunability), underscoring a promising approach to develop relaxors with enhanced functional capabilities and new possibilities.
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Details
- Title
- Highly Tunable Relaxors Developed from Antiferroelectrics
- Creators
- Hao Pan - University of California, BerkeleyLiyan Wu - Drexel University, Mechanical Engineering and MechanicsJohn Carroll - Drexel UniversityMenglin Zhu - Massachusetts Institute of TechnologyZishen Tian - University of California, BerkeleyDongfang Chen - Drexel University, Mechanical Engineering and MechanicsHongrui Zhang - University of California, BerkeleyXianzhe Chen - University of California, BerkeleyXiaoxi Huang - University of California, BerkeleyIrina Baraban - Drexel University, PhysicsSreekeerthi Pamula - University of California, BerkeleyCedric J. G. Meyers - Drexel UniversityR. Ramesh - University of California, BerkeleyKathleen Coleman - US Army, DEVCOM, Res Lab, Adelphi, MD 20783 USABrendan Hanrahan - DEVCOM Army Research LaboratoryJames M. Lebeau - Massachusetts Institute of TechnologyJonathan E. Spanier - Drexel University, PhysicsLane W. Martin - Rice Univ, Rice Adv Mat Inst, Houston, TX 77005 USA
- Publication Details
- Advanced materials (Weinheim), v 37(32), 2505376
- Publisher
- Wiley
- Number of pages
- 10
- Grant note
- W911NF-24-2-0100 / Army Research Laboratory; United States Department of Defense; US Army Research Laboratory (ARL) Air Force Office of Scientific Research; United States Department of Defense; Air Force Office of Scientific Research (AFOSR) W911NF-21-1-0126 / Army Research Office DMR-2329111 / National Science Foundation; National Science Foundation (NSF) Department of Defense, Air Force Office of Scientific Research; United States Department of Defense; Air Force Office of Scientific Research (AFOSR)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:001498528900001
- Scopus ID
- 2-s2.0-105007091543
- Other Identifier
- 991022054302904721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter