Unit
SCI STI DD Group
GroupRelated publications (104)
Nonlinear electro-mechanical coupling and thermally stimulated currents in relaxor ferroelectrics
In this work, the emergence of polarization and electro-mechanical coupling in Pb(Mg1/3Nb2/3)O3 and Pb(Mg1/3Nb2/3)O3 â PbTiO3 was investigated by means of thermally stimulated current, and nonlinear dielectric and electro-mechanical measurements. The pre ...
EPFL2022Individual Barkhausen pulses of ferroelastic nanodomains
Dragan Damjanovic, Vasiliki Tileli, Reinis Ignatans
Ferroelectric materials, upon electric field biasing, display polarization discontinuities known as Barkhausen jumps, a subclass of a more general phenomenon known as crackling noise. Herein, we follow at the nanoscale the motion of 90 degree needle domain ...
2020Origins of the macroscopic symmetry breaking in centrosymmetric phases of perovskite oxides
Many perovskite materials experience a temperature-driven phase transition at the Curie temperature from a non-centrosymmetric polar ferroelectric phase to a paraelectric phase, where polarization is lost. The paraelectric phase is usually centrosymmetric ...
EPFL2017Piezoelectric softening by Nb substitution in (Ba,Pb)ZrO
Nava Setter, Nicola Marzari, Dragan Damjanovic, Alberto Biancoli, David Bahati
Donor doping is commonly applied for softening of the piezoelectric and dielectric properties and facilitation of polarization switching in the ubiquitous Pb(Zr,Ti)O-3 [PZT] ceramics. The origin of the donor-dopant effects is not entirely clear. (Pb,Ba)ZrO ...
Wiley-Blackwell2017Domain Pinning: Comparison of Hafnia and PZT Based Ferroelectrics
Even though many studies on the field cycling behavior of ferroelectric hafnium oxide have recently been published, the issue is still not fully understood. The initial increase of polarization during first cycles is explained by different theoretical and ...
Wiley2017Domain walls and defects in ferroelectric materials
The results of recent studies of domain walls and their interaction with defects in BaTiO3, Pb(Zr, Ti)O-3, and BiFeO3 are discussed. The studies reveal why donor- and acceptor-doped Pb(Zr, Ti)O-3 behave differently, what is the role of stationary charged d ...
Japan Society of Applied Physics2017Which is the best thin film piezoelectric material?
The properties of piezoelectric thin films are reviewed for the case of the transverse piezoelectric effect using parallel plate electrodes. ...
Ieee2017Identification of defect distribution at ferroelectric domain walls from evolution of nonlinear dielectric response during the aging process
The motion of ferroelectric domain walls greatly contributes to the macroscopic dielectric and piezoelectric response of ferroelectric materials. The domain-wall motion through the ferroelectric material is, however, hindered by pinning on crystal defects, ...
Amer Physical Soc2016Piezoelectric response of BiFeO3 ceramics at elevated temperatures
The high Curie temperature (T-C similar to 825 degrees C) of BiFeO3 has made this material potentially attractive for the development of high-T-C piezoelectric ceramics. Despite significant advances in the search of new BiFeO3-based compositions, the piezo ...
American Institute of Physics2016Role of charged defects on the electrical and electromechanical properties of rhombohedral Pb(Zr,Ti)O3 with oxygen octahedra tilts
Oxygen octahedra tilting is a common structural phenomenon in perovskites and has been subject of intensive studies, particularly in rhombohedral Pb(Zr,Ti)O3 (PZT). Early reports suggest that the tilted octahedra may strongly affect the domain switching be ...
Amer Physical Soc2016