Concept

Titanate de baryum

Publications associées (395)

Size effect on permittivity in ferroelectric polydomain thin films

Nava Setter, Alexander Tagantsev, Pavel Mokry

The impact of electrode-adjacent passive layers on the small signal dielectric response of a ferroelectric film containing a 180degrees-domain pattern has been analyzed. It is shown that, for a realistic physical situation, the so-called "in-series capacit ...

2004

Three-dimensional ferroelectric domain imaging of bulk Pb(Zr,Ti)O-3 by atomic force microscopy

Nava Setter, Enrico Colla

We report on the ferroelectric domain evolution as a function of the depth of the surface of 100 mum thick bulk Pb(Zr,Ti)O-3 (PZT) doped with 2% Nb. Ferroelectric domain imaging (FDI) was performed by piezoelectric detection assisted by atomic force micros ...

2004

Lithography-modulated self-assembly of small ferroelectric Pb(Zr,Ti)O-3 single crystals

Paul Muralt, Simon Bühlmann

Triangular (111) and square-shaped (100) Pb(Zr,Ti)O-3 single crystallites with lateral dimensions down to 50 nm and thickness of 20 nm have been grown using lithography-modulated self-assembly in an in situ sputter process. Epitaxial (111)-oriented Pt on a ...

2004

Ferroelectric film capacitor structure with selective doping

Alexander Tagantsev

A ferroelectric film capacitor structure (FeCAP), in particular for memory applications, comprises a layer of doped ferroelectric material between facing electrodes having a varying/asymmetric doping profile, the concentration of the dopant in the ferroele ...

2003

Shift of phase transition temperature in strontium titanate thin films

Nava Setter, Alexander Tagantsev, Konstantin Astafiev

The results of structural and electrical characterizations of SrTiO3 thin films deposited onto MgO and LaAlO3 substrates by pulsed laser deposition technique are presented. The influence of substrate and annealing procedure on the crystalline structure and ...

2003

Piezoelectric anisotropy-phase transition relations in perovskite single crystals

Nava Setter, Dragan Damjanovic, Marko Budimir

The orientation dependence of the longitudinal piezoelectric coefficient, d(33)(*), is investigated as a function of temperature in BaTiO3 and PbTiO3 crystals using the Landau-Ginsburg-Devonshire theory. We show that a presence of the ferroelectric-ferroel ...

2003

Crossover between nucleation-controlled kinetics and domain wall motion kinetics of polarization reversal in ferroelectric films

Nava Setter, Alexander Tagantsev, Igor Stolichnov

The study of polarization reversal in (Pb,La)(Zr,Ti)O-3 thin films reveals a drastic difference between the switching kinetics observed at RT and at low temperature of 40 K. In particular, at 40 K, the switching kinetics in studied films is similar to that ...

2003

Can the addition of a dielectric improve the figure of merit of a tunable material?

Nava Setter, Alexander Tagantsev, Konstantin Astafiev

The influence of addition of a low-loss linear dielectric material to a tunable ferroelectric material has been investigated in terms of the electrostatic consideration. The calculations of the dielectric loss and dielectric non-linearity of ferroelectric- ...

2003

{100}-textured, piezoelectric Pb(Zr-x Ti1-x)O-3 thin films for MEMS: integration, deposition and properties

Nava Setter, Paul Muralt, Marco Cantoni, Andreas Seifert, Nicolas Ledermann

Pb(Zr-x, Ti1-x)O-3 (PZT) piezoelectric thin films are of major interest in MEMS technology for their ability to provide electro-mechanical coupling. In this work, the effective transverse piezoelectric coefficient e(31,f) of sol-gel processed films was inv ...

2003

Local growth of sol-gel films by means of microhotplates

Nava Setter, Paul Muralt, Florian Calame, Nicolas Ledermann

PZT (PbZrx Ti1-xO3) thin films have been locally grown by means of sol-gel deposition and local annealing on microhotplates. The microhotplates were based on a stress compensated Si3N4 /SiO2 membranes as structural elements and contained tantalum silicide ...

2003

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