Konstantin Astafiev

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Publications associées (5)

Structural and dielectric properties of strain-controlled epitaxial SrTiO3 thin films by two-step growth technique

Paul Muralt, Nava Setter, Alexander Tagantsev, Konstantin Astafiev

Structural and dielectric properties of epitaxial SrTiO3 (STO) thin films on LaAlO3 substrates fabricated by a two-step growth technique using pulsed laser deposition were investigated by in situ and ex situ observations in terms of strain relaxation from ...

2005

Quasi-Debye microwave loss as an intrinsic limitation of microwave performance of tunable components based on SrTiO3 and BaxSr1-xTiO3 ferroelectrics

Nava Setter, Alexander Tagantsev, Konstantin Astafiev

A model of the quasi-Debye loss mechanism in SrTiO3 and Ba0.6Sr0.4TiO3 perovskite ferroelectrics at microwave frequencies is presented. The field dependence and the size of the field-induced quasi-Debye loss contribution in SrTiO3 and Ba0.6Sr0.4TiO3 system ...

2005

Strain relaxation of epitaxial SrTiO3 thin films on LaAlO3 by two-step growth technique

Paul Muralt, Nava Setter, Alexander Tagantsev, Konstantin Astafiev

Using pulsed-laser deposition, a two-step growth technique was applied to epitaxial SrTiO3 (STO) thin films on LaAlO3 substrates providing a way to obtain an effective strain relaxation in these films otherwise strained due to lattice mismatch between film ...

2005

Ferroelectric materials for microwave tunable applications (vol 11, pg 5, 2003)

Nava Setter, Alexander Tagantsev, Konstantin Astafiev

Kluwer Academic Publishers, Springer2005

Polarization response of Perovskite films for microwave tunable applications

Konstantin Astafiev

Ferroelectric thin films are widely studied nowadays as potential replacements for semiconductors in modern tunable microwave devices such as tunable filters, phase-shifters, frequency mixers, power dividers, etc. Recent progress in the deposition of compl ...

EPFL2004

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