Random electric field instabilities of relaxor ferroelectrics [PDF]
npj Quantum Materials, 2017 Complex oxides: A random field state in a relaxor ferroelectric A microscopic model shows how compositional disorder in the form of quenched random electric fields acting in concert with dipolar interactions prohibit long-range ordering in relaxor ...
José R. Arce-Gamboa +1 more
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Ultrawide-temperature-stable high-entropy relaxor ferroelectrics for energy-efficient capacitors [PDF]
Nature CommunicationsThe development of dielectric ceramics that simultaneously achieve high energy density and ultra-broad temperature stability remains a fundamental challenge for advanced electrostatic capacitors.
Shiyu Zhou +10 more
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Emergent topological polarization textures in relaxor ferroelectrics [PDF]
Nature CommunicationsRelaxor ferroelectrics underpin high-performance actuators and sensors, yet the nature of polar heterogeneities driving their broadband dielectric response remains debated.
Maksim Eremenko +13 more
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Origin of dielectric relaxor behavior in PVDF-based copolymer and terpolymer films
AIP Advances, 2018 Relaxor ferroelectrics exhibit frequency-dispersion of their dielectric permittivity peak as a function of temperature, the origin of which has been widely debated. Microscopic understanding of such behavior for polymeric ferroelectrics has presented new
Abhijit Pramanick +8 more
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Subterahertz dielectric relaxation in lead-free Ba(Zr,Ti)O3 relaxor ferroelectrics [PDF]
Nature Communications, 2016 Relaxor ferroelectrics possess potential microwave frequency applications due to characteristic dielectric relaxation properties however the underlying mechanism is debated.
D. Wang +4 more
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BiFeO3-Based Relaxor Ferroelectrics for Energy Storage: Progress and Prospects. [PDF]
Materials (Basel), 2021 Dielectric capacitors have been widely studied because their electrostatic storage capacity is enormous, and they can deliver the stored energy in a very short time. Relaxor ferroelectrics-based dielectric capacitors have gained tremendous importance for
Deka B, Cho KH.
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Large strain and high reversible dielectric tunability in Sm-modified PMN-PT ceramics [PDF]
Nature CommunicationsRelaxor ferroelectrics offer dynamic polar responses desirable for adaptive electronics, yet they are fundamentally constrained by a long-standing trade-off: compositions that deliver large electric-field induced strain typically suffer from pronounced ...
Hangfeng Zhang +3 more
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Relaxor behavior in rocksalt cation-ordered material induced by (anti)ferroelectric phase competition [PDF]
Nature CommunicationsRelaxor ferroelectrics are characterized by dispersion of the temperature-dependent dielectric constant with frequency and enhanced electromechanical coupling.
Yu Yun +17 more
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Topological Point Defects in Relaxor Ferroelectrics
Physical Review Letters, 2016 First-principles-based effective Hamiltonian simulations are used to reveal the hidden connection between topological defects (hedgehogs and antihedgehogs) and relaxor behavior. Such defects are discovered to predominantly lie at the border of polar nanoregions in both Ba(Zr_{0.5}Ti_{0.5})O_{3} (BZT) and Pb(Sc_{0.5}Nb_{0.5})O_{3} (PSN) systems, and the
Nahas, Y. +3 more
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Theory of relaxor-ferroelectricity [PDF]
Scientific Reports, 2020 AbstractRelaxor-ferroelectrics are fascinating and useful materials, but the mechanism of relaxor-ferroelectricity has been puzzling the scientific community for more than 65 years. Here, a theory of relaxor-ferroelectricity is presented based on 3-dimensional-extended-random-site-Ising-model along with Glauber-dynamics of pseudospins. We propose a new
Zhang, Li-Li, Huang, Yi-Neng
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