Results 51 to 60 of about 8,790 (190)

Diffusive phase transitions in ferroelectrics and antiferroelectrics [PDF]

, 2003
In this paper, we present a microscopic model for heterogeneous ferroelectric and an order parameter for relaxor phase. We write a Landau theory based on this model and its application to ferroelectric PbFe$_{1/2}$Ta$_{1/2}$O$_3$ (PFT) and ...
Prosandeev, S. A., Raevski, I. P., Waghmare, U. V.   +2 more
core   +3 more sources

Non-Resonant Magnetoelectric Energy Harvesting Utilizing Phase Transformation in Relaxor Ferroelectric Single Crystals

Actuators, 2015
Recent advances in phase transition transduction enabled the design of a non-resonant broadband mechanical energy harvester that is capable of delivering an energy density per cycle up to two orders of magnitude larger than resonant cantilever ...
Peter Finkel, Richard Pérez Moyet, Marilyn Wun-Fogle, James Restorff, Jesse Kosior, Margo Staruch, Joseph Stace, Ahmed Amin   +7 more
doaj   +1 more source

Structure factor of a relaxor ferroelectric

Physical Review B, 2015
We study a minimal model for a relaxor ferroelectric including dipolar interactions, and short-range harmonic and anharmonic forces for the critical modes as in the theory of pure ferroelectrics together with quenched disorder coupled linearly to the critical modes.
Guzmán Verri, Gian Giacomo, Varma, Chandra M.   +1 more
openaire   +5 more sources

Titanate-based high-entropy perovskite oxides relaxor ferroelectrics

Scientific Reports
Different combinations of monovalent and trivalent A-cations in high-entropy perovskite oxides (HEPOs) were investigated. The multicomponent (A′0.2A″0.2Ba0.2Sr0.2Ca0.2)TiO3 (A′ = Na+, K+, A″ = Bi3+, La3+) perovskite compounds were successfully ...
Ketkaeo Bunpang, Suparat Singkammo, David P. Cann, Natthaphon Raengthon   +3 more
doaj   +1 more source

AgNb7O18 : an ergodic relaxor ferroelectric [PDF]

, 2014
AgNb7O18 is an ergodic relaxor ferroelectric at room temperature with an incipient transition to the nonergodic state. Electron diffraction confirms a locally polar symmetry, while X-ray diffraction perceives a nonpolar structure.
Beanland, R., Woodward, David I.
core   +1 more source

Investigation on relaxor-ferroelectric behavior of BNBT-KNN ceramics with Ta doping

Journal of Advanced Dielectrics
In this study, BNBT-KNN-xTa2O5 was designed and synthesized, successfully achieving a reduction in the relaxor-ferroelectric phase transition temperature.
Chenglong Zhang, Shurong Li, Suzhi Li, Le Zhang, Haijun Wu   +4 more
doaj   +1 more source

Crossover from normal to diffused and relaxor ferroelectric in BaZrO3-modified (Ba0.85Ca0.15)TiO3 ceramics

Journal of Materiomics, 2021
The variation of dielectric, ferroelectric and piezoelectric characteristics of BaZrO3–modified (Ba0.85Ca0.15)TiO3 ceramics, (1-x)(Ba0.85Ca0.15)TiO3-xBaZrO3, have been investigated together with the structure evolution.
Shao Bo Chen, Jia Yi Yang, Shu Ya Wu, Xiang Ming Chen   +3 more
doaj   +1 more source

First principles based atomistic modeling of phase stability in PMN-xPT

, 2011
We have performed molecular dynamics simulations using a shell model potential developed by fitting first principles results to describe the behavior of the relaxor-ferroelectric (1-x)PbMg1/3Nb2/3O3-xPbTiO3 (PMN-xPT) as function of concentration and ...
Egami T, Kania A, M Sepliarsky, Mitchell P J, R E Cohen, Samara G A, Smith W Forester T R Todorov I T, Vanderbilt D   +7 more
core   +1 more source

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., Prokhorenko, S., Kornev, I., Bellaiche, L.   +3 more
openaire   +3 more sources

Enhanced Energy Storage Performance in La-Doped CaBi₄Ti₄O₁₅ Films Through the Formation of a Weakly Coupled Relaxor

Nanomaterials
Relaxor ferroelectric film capacitors exhibit high power density with ultra-fast charge and discharge rates, making them highly advantageous for consumer electronics and advanced pulse power supplies.
Quanlong Liu, Lei Zhang, Jun Ouyang, Yan Liu, Zhehong Tang, Jieyu Chen, Fei Guo, Yunpeng Zhou   +7 more
doaj   +1 more source