Results 41 to 50 of about 17,703 (286)
Polarization reversal via a transient relaxor state in nonergodic relaxors near freezing temperature
Journal of Materiomics, 2019 Among the unresolved issues in the study of relaxor ferroelectrics is the role of freezing temperature, across which the dynamics of polarization reversal in relaxor ferroelectrics changes.
Chang-Hyo Hong +4 more
doaj +1 more source
Giant dynamic electromechanical response via field driven pseudo-ergodicity in nonergodic relaxors
Nature Communications, 2023 Enhanced electromechanical response can commonly be found during the crossover from normal to relaxor ferroelectric state, making relaxors to be potential candidates for actuators.
He Qi +5 more
doaj +1 more source
Ferroelectric Relaxor Quantum Crystals [PDF]
Crystals, 2018 A discussion is given of ferroelectrics (FEs) that have their Curie temperatures Tc very near absolute zero. These have differences in their dynamics in comparison with higher-temperature systems, since domain wall motion occurs via quantum mechanical tunneling and not by thermally activated diffusion.
openaire +4 more sources
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
doaj +1 more source
Journal of Materiomics, 2018 Novel A-site deficient (1-x-y)Bi0.5Na0.5TiO3-xBaTiO3-yBi0.2Sr0.7TiO3 lead-free relaxor ferroelectrics have been explored for energy storage property. Particularly slim polarization hysteresis (P-E) loops are observed in 0.655Bi0.5Na0.5TiO3-0.065BaTiO3-0 ...
Xiao Liu +6 more
doaj +1 more source
Electrocaloric Cooling - A New Application of Relaxor Ferroelectrics [PDF]
, 2018 Until now, relaxor ferroelectrics are considered as a class of disordered materials possessing peculiar structures and properties which are not yet generalized into a universal model explaining the significant amount of experimental data available.
Gerlach, G. +3 more
core +1 more source
Relaxor Behaviour in Ferroelectric Ceramics [PDF]
, 2012 The chapter shows the studies carried out on several relaxor ferroelectric ceramic materials, which have been developed by the present authors. Lanthanum modified lead zirconatetitanate ceramics will be evaluated considering different La3+ concentrations and Zr/Ti ratios.
Peláiz Barranco, Aimé +3 more
openaire +2 more sources
Dynamics of relaxor ferroelectrics [PDF]
Physical Review B, 2001 We study a dynamic model of relaxor ferroelectrics based on the spherical random-bond---random-field model and the Langevin equations of motion. The solution to these equations is obtained in the long-time limit where the system reaches an equilibrium state in the presence of random local electric fields.
Pirc, R., Blinc, R., Bobnar, V.
openaire +2 more sources
Ultrahigh energy storage in superparaelectric relaxor ferroelectrics.
, 2021 Electrostatic energy storage technology based on dielectrics is fundamental to advanced electronics and high-power electrical systems. Recently, relaxor ferroelectrics characterized by nanodomains have shown great promise as dielectrics with high energy ...
core +2 more sources
Small Science, 2021 Relaxor ferroelectric polymers exhibit both high dielectric constants and low remnant polarization and thus deliver much higher energy densities and greater charge–discharge efficiencies than normal ferroelectrics for capacitive energy storage ...
Yang Liu +7 more
doaj +1 more source