25 research outputs found
Reliability and effectiveness of LiNbO3 ferroelectric sputtered on ITO-based conductive electrode
International audienc
LiNbO-based ferroelectric heterostructures
We report the growth of LiNbO thin films onto
InO:Sn-coated 111-Si substrates by standard radio-frequency
sputtering. Multi-layer procedures, up to 4 successive deposits, have been
developed that can subsequently improve the structural and macroscopic
ferroelectric properties of such as-grown composite structures. The
enhancement of polarization, as high as 40 C.cm in 4 stacked
layers, is attributed to -oriented seed-layer-induced crystallization
(self-polarization) and interfacial (migratory) polarizatio
ITO-based electrode: A promising candidate for the growth of piezoelectric thin films
In many ways, interfaces and surfaces dominate the
behavior of thin films and multilayered devices. The critical nature that
the interfaces play on numerous physical properties has stimulated
significant effort to both understand such behavior and develop novel and
potentially useful nanoscale systems. In particular, the use of suitable
buffer layers has been shown to allow the control of nucleation and growth
processes and, thus, the fabrication of a very wide range of nanostructured
materials. This paper briefly overviews the relevant experimental work
performed at the LPMC and related to piezoelectric thin films. Particular
emphasis is given to InO:Sn oxide as an interesting conductive
electrode / buffer layer for the growth of various piezoelectric compounds
including LiNbO (LN), Pb(ZrTiO (PZT), ZnO
Physical Characterizations of Gapo4 single Crystals Grown by the Flux Method
International audienc
Influence des paramètres de dépôt sur la morphologie de films minces de tétraborate de lithium obtenus par le procédé “PYROSOL"
LiBO piezo-electric thin films were prepared by “PYROSOL" process which is a useful method for the elaboration of thin films. Morphological development and crystallization of thin films are very dependent on the experimental parameters like the substrate temperature, the concentration and the relative proportion of the precursors in methyl alcohol. The effect of these various parameters were studied in order to obtain homogeneous, crystallized and oriented thin films.La réalisation de couches minces de matériaux piézo-électriques de LiBO par le procédé “PYROSOL" révèle une grande diversité de conditions de dépôt. La température du substrat, la composition des solutions de précurseurs et leur concentration conditionnent la morphologie et l'état de cristallisation des films. En particulier, l'obtention de couches minces denses, homogènes et présentant une orientation préférentielle nécessite des températures de substrat supérieures à 620 C. L'influence de ces divers paramètres expérimentaux a été étudiée dans le but d'obtenir des dépôts homogènes, cristallisés et orientés
Dielectric investigations of PZT under high pressures and low temperatures
International audienc
influence of the poling process on the pyroelectric coefficient of a 70/30 P(VDF-TrFE) thin film
International audienc