A study of the phase diagram of (K,Na,Li)NbO3 determined by dielectric and piezoelectric measurements, and Raman spectroscopy

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Structural Determinants of the Sign of the Pyroelectric Effect in Quasi-Amorphous SrTiO3 Films

Alexander Tagantsev

The magnitude and direction of the permanent electric polarization in the non-crystalline, polar phase (termed quasi-amorphous) of SrTiO3 in Si\SiO2\Me\SrTiO3\Me, (Me = Cr or W), Si\SrRuO3\SrTiO3, and Si\SrTiO3 layered structures were investigated. Three p ...

Wiley-Blackwell2011

A morphotropic phase boundary system based on polarization rotation and polarization extension

Dragan Damjanovic

Many ferroelectric solid solutions exhibit enhanced electromechanical properties at the morphotropic boundary separating two phases with different orientations of polarization. The mechanism of properties enhancement is associated with easy paths for polar ...

American Institute of Physics2010

Separation of piezoelectric grain resonance and domain wall dispersion in Pb(Zr,Ti)O-3 ceramics

Dragan Damjanovic, Li Jin

We report on the experimental investigation of a high-frequency (1 MHz-1.8 GHz) dielectric dispersion in unpoled and poled Pb(Zr,Ti)O-3 ceramics. Two overlapping loss peaks could be revealed in the dielectric spectrum. The linear dependence between the low ...

American Institute of Physics2009

Retention in nonvolatile silicon transistors with an organic ferroelectric gate

Mihai Adrian Ionescu, Nava Setter, Alexander Tagantsev, Didier Bouvet, Igor Stolichnov, Sebastian Riester, Roman Gysel, Giovanni Antonio Salvatore

A silicone-based one-transistor nonvolatile memory cell has been implemented by integration of a ferroelectric polymer gate on a standard n- type metal oxide semiconductor field effect transistor. The polarization reversal in the gate results in a stable a ...

AIP American Institute of Physics2009

Physical aspects of colossal dielectric constant material CaCu3Ti4O12 thin films

Paul Muralt

The underlying physical mechanism of the so-called colossal dielectric constant phenomenon in CaCu3Ti4O12 CCTO thin films were investigated by using semiconductor theories and methods. The semiconductivity of CCTO thin films originated from the acceptor de ...

2009

Susceptibility anomaly in films with bilinear coupling between order parameter and strain

Alexander Tagantsev

The dielectric response of a ferroelectric film with bilinear coupling between order parameter and strain is theoretically addressed. An exact solution for the total (lattice and domain contributions) dielectric permittivity of the system for the case wher ...

2005

Polarization reversal due to charge injection in ferroelectric films

Paul Muralt, Enrico Colla, Simon Bühlmann

The origin of a recently reported peculiar phenomenon-polarization reversal against the applied electric field in ferroelectric thin films [M. Aplanalp and P. Gunter, Ferroelectrics 258, 3 (2001), T. Morita and Y. Cho, Appl. Phys. Lett. 84, 257 (2004)]-has ...

2005

Thin film multilayer design types for colored glazed thermal solar collectors

Jean-Louis Scartezzini, Andreas Schueler, Christian Roecker, Estelle De Chambrier

Multilayered inteference filters of dielectric thin films have been designed for the application as energy-efficient coloration of collector cover glasses. The optical behavior of the designed multilayers is analyzed by computer simulations yielding the CI ...

2005