199 citations · 492 across the 14 of their papers we have counts for
14 papers
Oxygen vacancies in BaTiO3 based ferroelectrics: electron doping, history dependence of Tc and domain wall pinning
Francesco Cordero, Floriana Craciun, Paulo Sergio da Silva +3
We measured the complex Young's modulus of BaTiO3-d, BaxSr1-xTi3-d (BST) and Ba0.85Ca0.15Zr0.1Ti0.9O3-d (BCTZ) during heating and cooling runs at various O deficiencies and aging t…
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…
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…
Rotational instability of the electric polarization and divergence of the shear elastic compliance
F. Cordero, H. T. Langhammer, T. Müller +2
The rotational instability of the electric polarization P during phase transformations between ferroelectric phases is of great practical interest, since it may be accompanied by e…
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…
Anelastic spectroscopy study of the metal-insulator transition of Nd(1-x)EuxNiO3
F. Cordero, F. Trequattrini, V. B. Barbeta +2
Measurements are presented of the complex dynamic Young's modulus of NdNiO3 and Nd0.65Eu0.35NiO3 through the Metal-Insulator Transition (MIT). On cooling, the modulus presents a na…
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…
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…
Hydrogen tunneling in the perovskite ionic conductor BaCe(1-x)Y(x)O(3-d)
F. Cordero, F. Craciun, F. Deganello +3
We present low-temperature anelastic and dielectric spectroscopy measurements on the perovskite ionic conductor BaCe(1-x)Y(x)O(3-x/2) in the protonated, deuterated and outgassed st…
Low-temperature phase transformations of PZT in the morphotropic phase-boundary region
F. Cordero, F. Craciun, C. Galassi
We present anelastic and dielectric spectroscopy measurements of PbZr(1-x)Ti(x)O(3) with 0.455 < x < 0.53, which provide new information on the low temperature phase transitions. T…
High temperature memory in (Pb/La)(Zr/Ti)O_3 as intrinsic of the relaxor state rather than due to defect relaxation
F. Cordero, F. Craciun, A. Franco +1
It has been recently shown that the memory of multiple aging stages, a phenomenon considered possible only below the glass transition of some glassy systems, appears also above tha…
Polar and non-polar atomic motions in the relaxor ferroelectric PLZT from dielectric, anelastic and NMR relaxation
F. Cordero, M. Corti, F. Craciun +3
Dielectric, anelastic and ^139La NMR relaxation measurements have been made on the relaxor ferroelectric Pb(1-3x/2)La(x)Zr(0.2)Ti(0.8)O(3) (PLZT) with x = 0.22. The dielectric susc…
Memory of multiple aging stages above the freezing temperature in the relaxor ferroelectric PLZT
F. Cordero, F. Craciun, A. Franco +2
The dynamic dielectric susceptibility and elastic compliance of the relaxor ferroelectric PLZT 9/65/35 have been measured under different cooling and heating protocols, in order to…