Results 31 to 40 of about 2,097 (293)
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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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
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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
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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
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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.
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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 +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 +1 more
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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
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Ferroelectricity and Self-Polarization in Ultrathin Relaxor Ferroelectric Films [PDF]
Scientific Reports, 2016 AbstractWe report ferroelectricity and self-polarization in the (001) oriented ultrathin relaxor ferroelectric PMN-PT films grown on Nb-SrTiO3, SrRuO3 and La0.7Sr0.3MnO3, respectively. Resistance-voltage measurements and AC impedance analysis suggest that at high temperatures Schottky depletion width in a 4 nm thick PMN-PT film deposited on Nb-SrTiO3 ...
Peixian Miao +9 more
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Origin of the enhanced flexoelectricity of relaxor ferroelectrics [PDF]
Applied Physics Letters, 2014 We have measured the bending-induced polarization of Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystals with compositions at the relaxor-ferroelectric phase boundary. The crystals display flexocoupling coefficients f > 100 V, an order of magnitude bigger than the theoretical upper limit set by the theories of Kogan and Tagantsev.
Jackeline Narvaez, Gustau Catalan
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