Publications de Andreas Nöth | EPFL Graph Search

Effect of mechanical loading on the tuning of acoustic resonances in Ba (x) Sr1-x TiO3 thin films

Nava Setter, Alexander Tagantsev, Andreas Nöth

The effect of mechanical loading on the tuning performance of a tunable Thin Film Bulk Acoustic Wave Resonator (TFBAR) based on a Ba0.3Sr0.7TiO3 (BST) thin film has been investigated experimentally and theoretically. A membrane-type TFBAR was fabricated by ...

Springer US2010

Tunable thin film bulk acoustic wave resonator based on BaxSr1-xTiO3 thin film

Paul Muralt, Nava Setter, Alexander Tagantsev, Andreas Nöth

A tunable membrane-type thin film bulk acoustic wave resonator (TFBAR) based on a Ba0.3Sr0.7TiO3(BST) thin film has been fabricated. The resonance and antiresonance frequencies of the device can be altered by applying a dc bias: both shift down with increa ...

2010

Self-Assembled Perovskite-Fluorite Oblique Nanostructures for Adaptive (Tunable) Electronics

Paul Muralt, Nava Setter, Alexander Tagantsev, Silviu Cosmin Sandu, Andreas Nöth, Maxim Gureev

The relative concentration of BaTiO3 and CeO2 is shown to control the inclination of composite growth. The oblique composite structures consist of tunable BaTiO3 nanofibers embedded in a CeO2 matrix, which lowers considerably the permittivity while signifi ...

Wiley2009

Micromachined tunable devices based on silicon integrated BaxSr1-xTiO3 thin films : concepts, fabrication and characterization

Andreas Nöth

Thin Film Bulk Acoustic Wave Resonators (TFBARs) had been developed a decade ago and since then were implemented extensively in mobile communications devices. The "heart" of a TFBAR consists of a piezoelectric film that operates as an acousto-electric tran ...

EPFL2009

Electrical tuning of dc bias induced acoustic resonances in paraelectric thin films

Nava Setter, Alexander Tagantsev, Andreas Nöth

A theoretical model for the dc bias dependence of induced acoustic resonances in paraelectric materials is presented. The field dependent piezoelectric constitutive equations were derived from the Landau free energy expansion with respect to the ferroelect ...

2008

DC bias-dependent shift of the resonance frequencies in BST thin film membranes

Paul Muralt, Nava Setter, Alexander Tagantsev, Andreas Nöth

2007

Tunable ferroelectric thin films with enhanced responses through nano- structural control

Paul Muralt, Nava Setter, Alexander Tagantsev, Andreas Nöth

BaxSr1-xTiO3 (BST) and its composite films have been studied for the improvement of the tunable performances via nano-structual control. The strong correlation between strain and tunability similar to that between strain and permittivity was confirmed in t ...

IEEE2007