199 citations · 577 across the 12 of their papers we have counts for
13 papers
Elastic precursor effects during the BaSrTiO ferroelastic phase transitions
Francesco Cordero, Francesco Trequattrini, Paulo Sergio da Silva +3
Elastic softening in the paraelastic phases of BaSrTiO is largest near the transition temperatures and decreases on heating smoothly over extended temperature r…
Influence of Temperature, Pressure and Humidity on the Stabilities and Transitions Kinetics of the Various Polymorphs of FAPbI
Francesco Cordero, Floriana Craciun, Francesco Trequattrini +4
The phase transitions between the various polymorphs of FAPbI (FAPI, FA = formamidinium CH(NH)) are studied by anelastic, dielectric and X--ray diffraction meas…
Stability of Cubic FAPbI from X-ray Diffraction, Anelastic, and Dielectric Measurements
Francesco Cordero, Floriana Craciun, Francesco Trequattrini +4
Among the hybrid metal-organic perovskites for photovoltaic applications FAPbI_3 (FAPI) has the best performance regarding efficiency and the worst regarding stability, even though…
Probing ferroelectricity in highly conducting materials through their elastic response: persistence of ferroelectricity in metallic BaTiO3-d
F. Cordero, F. Trequattrini, F. Craciun +3
The question whether ferroelectricity (FE) may coexist with a metallic or highly conducting state, or rather it must be suppressed by the screening from the free charges, is the fo…
Competition between Polar and Antiferrodistortive Modes and Correlated Dynamics of the Methylammonium Molecules in MAPbI from Anelastic and Dielectric Measurements
Francesco Cordero, Floriana Craciun, Francesco Trequattrini +3
The mechanisms behind the exceptional photovoltaic properties of the metallorganic perovskites are still debated, and include a ferroelectric (FE) state from the ordering of the el…
Elastic aging from coexistence and transformations of ferroelectric and antiferroelectric states in PZT
Francesco Cordero, Floriana Craciun, Francesco Trequattrini +2
Materials undergoing antiferroelectric/ferroelectric (AFE/FE) transitions are studied for possible applications that exploit the large volume, charge and entropy differences betwee…
Piezoelectric softening in ferroelectrics: ferroelectric versus antiferroelectric PbZrTiO
F. Cordero, F. Craciun, F. Trequattrini +1
The traditional derivation of the elastic anomalies associated with ferroelectric (FE) phase transitions in the framework of the Landau theory is combined with the piezoelectric co…
Effects of aging and annealing on the polar and antiferrodistortive components of the antiferroelectric transition in PZT
F. Cordero, F. Trequattrini, F. Craciun +1
The antipolar and antiferrodistortive (AFD) components of the antiferroelectric (AFE) transition in PbZr1-xTixO3 (x=0.054) can occur separately and with different kinetics, dependi…
Effects of coupling between octahedral tilting and polar modes on the phase diagram of PbZr1-xTixO3 (PZT)
F. Cordero, F. Trequattrini, F. Craciun +1
The results are presented of anelastic and dielectric spectroscopy measurements on large grain ceramic PZT with compositions near the two morphotropic phase boundaries (MPBs) that…
Octahedral tilting, monoclinic phase and the phase diagram of PZT
F. Cordero, F. Trequattrini, F. Craciun +1
Anelastic and dielectric spectroscopy measurements on PZT close to the morphotropic (MPB) and antiferroelectric boundaries provide new insight in some controversial aspects of its…
Metal-insulator transition in Nd1-xEuxNiO3 probed by specific heat and anelastic measurements
V. B. Barbeta, R. F. Jardim, M. S. Torikachvili +4
Oxides RNiO3 (R = rare-earth, R # La) exhibit a metal-insulator (MI) transition at a temperature TMI and an antiferromagnetic (AF) transition at TN. Specific heat (CP) and anelasti…
Effect of doping and oxygen vacancies on the octahedral tilt transitions in the BaCeO3 perovskite
F. Cordero, F. Trequattrini, F. Deganello +3
We present a systematic study of the effect of Y doping and hydration level on the structural transformations of BaCeO3 based on anelastic spectroscopy experiments. The temperature…
Phase transitions and phase diagram of the ferroelectric perovskite NBT-BT by anelastic and dielectric measurements
F. Cordero, F. Craciun, F. Trequattrini +2
The complex elastic compliance and dielectric susceptibility of (Na_{0.5}Bi_{0.5})_{1-x}Ba_{x}TiO_{3} (NBT-BT) have been measured in the composition range between pure NBT and the…