Tadej Rojac
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View article: Capacitive energy-storage and electromechanical properties of aerosol-deposited 0.5BaZr0.2Ti0.8O3–0.5Ba0.7Ca0.3TiO3 films
Capacitive energy-storage and electromechanical properties of aerosol-deposited 0.5BaZr0.2Ti0.8O3–0.5Ba0.7Ca0.3TiO3 films Open
View article: Large High‐Temperature Piezoelectric Response of Lead‐free BiFeO<sub>3</sub>–BaTiO<sub>3</sub> Originating from Relaxor Disorder
Large High‐Temperature Piezoelectric Response of Lead‐free BiFeO<sub>3</sub>–BaTiO<sub>3</sub> Originating from Relaxor Disorder Open
To date, no piezoelectric material system has been developed that would match the piezoelectric performance of the group of lead‐based relaxor ferroelectrics, such as Pb(Mg 1/3 Nb 2/3 )O 3 –PbTiO 3 (PMN–PT). In the quest to find alternativ…
View article: Origin of Enhanced Dielectric Tunability in Antiferroelectric Ceramic Systems
Origin of Enhanced Dielectric Tunability in Antiferroelectric Ceramic Systems Open
Antiferroelectric ceramics are considered as highly promising materials for the development of novel DC‐link, snubber, and filter capacitors used in high‐power and high‐speed electronics for electromotive and renewable energy applications,…
View article: Impact of transient liquid phase on the cold sintering of multiferroic BiFeO3
Impact of transient liquid phase on the cold sintering of multiferroic BiFeO3 Open
View article: Origins of the large piezoelectric response of samarium-doped lead magnesium niobate–lead titanate ceramics
Origins of the large piezoelectric response of samarium-doped lead magnesium niobate–lead titanate ceramics Open
The recent discovery of the large piezoelectric response of Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 (PMN-PT) ceramics induced by samarium doping has provided a substantially improved functionality to the group of lead-based relaxor-ferroelectric ma…
View article: Surface Modification of Copper-Based Flakes for Conductive Polymer Composites
Surface Modification of Copper-Based Flakes for Conductive Polymer Composites Open
The physical properties as well as thermal and electrical stability of copper particles can be improved by surface protection, which mainly depends on the coating material. Our study was, therefore, focused on the rheological, thermal, mec…
View article: Electromechanical properties of uniaxial polar ionic plastic crystal [(C<sub>2</sub>H<sub>5</sub>)<sub>4</sub>N][FeBrCl<sub>3</sub>]
Electromechanical properties of uniaxial polar ionic plastic crystal [(C<sub>2</sub>H<sub>5</sub>)<sub>4</sub>N][FeBrCl<sub>3</sub>] Open
Ferroelectric plastic crystals are an emerging class of materials that combine room temperature ferroelectricity and piezoelectricity with a high temperature plastic mesophase prior to melting. These materials offer possibilities for acces…
View article: Piezoelectric Properties of BiFeO<sub>3</sub> Exposed to High Temperatures
Piezoelectric Properties of BiFeO<sub>3</sub> Exposed to High Temperatures Open
BiFeO 3 is a ferroelectric with a Curie temperature of 830 °C, however, its piezoelectric performance at high temperature remains unclear. The current work reveals a disappearance/recovery of piezoelectricity in BiFeO 3 at elevated tempera…
View article: Influence of neutron and gamma irradiation on the electrocaloric properties of Mn-doped 0.9Pb(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>–0.1PbTiO<sub>3</sub> ceramics
Influence of neutron and gamma irradiation on the electrocaloric properties of Mn-doped 0.9Pb(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>–0.1PbTiO<sub>3</sub> ceramics Open
The influence of neutron and gamma irradiation on the low- and high-field dielectric and electrocaloric (EC) properties of Mn-doped 0.9Pb(Mg 1/3 Nb 2/3 )O 3 –0.1PbTiO 3 (PMN–10PT) ceramic is studied. Upon exposure to neutron fluences of up…
View article: Pressure Control of Nonferroelastic Ferroelectric Domains in ErMnO<sub>3</sub>
Pressure Control of Nonferroelastic Ferroelectric Domains in ErMnO<sub>3</sub> Open
Mechanical pressure controls the structural, electric, and magnetic order in solid-state systems, allowing tailoring of their physical properties. A well-established example is ferroelastic ferroelectrics, where the coupling between pressu…
View article: Electric-field-induced non-ergodic relaxor to ferroelectric transition in BiFeO3-xSrTiO3 ceramics
Electric-field-induced non-ergodic relaxor to ferroelectric transition in BiFeO3-xSrTiO3 ceramics Open
While BiFeO3-based solid solutions show great promise for applications in energy conversion and storage, realizing this promise necessitates understanding the structure-property relationship in particular pertaining to the relaxor-like cha…
View article: Piezoelectric response of disordered lead-based relaxor ferroelectrics
Piezoelectric response of disordered lead-based relaxor ferroelectrics Open
Lead-based relaxor ferroelectric perovskite oxides, exemplified by the (1–x)Pb(Mg 1/3 Nb 2/3 )O 3 –xPbTiO 3 (PMN-PT) solid solution, are a group of multifunctional materials with unique dielectric and piezoelectric properties. The long-las…
View article: Electric-field-induced non-ergodic relaxor to ferroelectric transition in BiFeO<sub>3</sub>–<i>x</i>SrTiO<sub>3</sub> ceramics
Electric-field-induced non-ergodic relaxor to ferroelectric transition in BiFeO<sub>3</sub>–<i>x</i>SrTiO<sub>3</sub> ceramics Open
The increase in ergodicity in BFO– x STO is correlated with a weak ferroelectric response. The increased disorder induces a non-ergodic ground state, preventing the classic ferroelectric crossover.
View article: Multifunctional flexible ferroelectric thick-film structures with energy storage, piezoelectric and electrocaloric performance
Multifunctional flexible ferroelectric thick-film structures with energy storage, piezoelectric and electrocaloric performance Open
Flexible ferroelectric PMN–35PT thick film structures with energy storage, piezoelectric and electrocaloric performance were prepared by the room-temperature aerosol deposition method.
View article: Atomic-Level Response of the Domain Walls in Bismuth Ferrite in a Subcoercive-Field Regime
Atomic-Level Response of the Domain Walls in Bismuth Ferrite in a Subcoercive-Field Regime Open
The atomic-level response of zigzag ferroelectric domain walls (DWs) was investigated with in situ bias scanning transmission electron microscopy (STEM) in a subcoercive-field regime. Atomic-level movement of a single DW was observed. Unex…
View article: Electromechanical response of poly(vinylidenefluoride) thin films under acoustic stimuli
Electromechanical response of poly(vinylidenefluoride) thin films under acoustic stimuli Open
Understanding and controlling the vibration of piezoelectric components induced by oscillating external stimuli is essential to develop smart sensing and energy harvesting devices that convert mechanical energy into electricity. Piezoelect…
View article: Multifunctional Properties of Polyvinylidene-Fluoride-Based Materials: From Energy Harvesting to Energy Storage
Multifunctional Properties of Polyvinylidene-Fluoride-Based Materials: From Energy Harvesting to Energy Storage Open
International audience
View article: Piezoelectric properties of mechanochemically processed 0.67BiFeO3-0.33BaTiO3 ceramics
Piezoelectric properties of mechanochemically processed 0.67BiFeO3-0.33BaTiO3 ceramics Open
View article: Reduction of the lattice strain with increasing field amplitude in polycrystalline BiFeO3
Reduction of the lattice strain with increasing field amplitude in polycrystalline BiFeO3 Open
As dynamic interfaces in piezoelectric materials, domain walls can greatly impact the functionality under applied external fields. Recently, conductive domain walls have been found to result in Maxwell-Wagner (M-W)-like dispersion of the l…
View article: Dynamics of domain walls in ferroelectrics and relaxors
Dynamics of domain walls in ferroelectrics and relaxors Open
The dynamic contribution of domain walls (DWs) to application‐relevant dielectric and piezoelectric properties of ferroelectrics and relaxor‐based oxide ceramics has been in the focus since the earliest studies on these complex multifuncti…
View article: High radiation tolerance of electrocaloric (1-x)Pb(Mg1/3Nb2/3)O3–xPbTiO3
High radiation tolerance of electrocaloric (1-x)Pb(Mg1/3Nb2/3)O3–xPbTiO3 Open
High radiation tolerance of functional materials in harsh environments is the key requirement for the operation of particle accelerators, medical devices, nuclear power plants, satellites, and spacecraft. Neutron and gamma (γ) radiation ca…
View article: Quenching effects and mechanisms in bismuth-based perovskite ferroelectrics
Quenching effects and mechanisms in bismuth-based perovskite ferroelectrics Open
The similar electronic structure of Bi3+ and Pb2+ has motivated researchers to explore bismuth-based perovskite compounds, which in the past decade has been further fuelled by the demand for developing lead-free piezoceramics. The difficul…
View article: Piezoelectric Actuators
Piezoelectric Actuators Open
With the rapid development of modern science and technology, great progress has been made in many high-tech fields such as aerospace engineering, ultra-precision machining and assembly, biomedical engineering, precision optical engineering…
View article: Destabilization of the ferroelectric order in Na0.5Bi0.5TiO3–6 wt% BaTiO3 ceramics through doping
Destabilization of the ferroelectric order in Na0.5Bi0.5TiO3–6 wt% BaTiO3 ceramics through doping Open
One of the most promising candidates to replace lead-based compounds in actuator applications are Na0.5Bi0.5TiO3 (NBT)-based materials. K0.5Na0.5NbO3 (KNN)-modified NBT-BaTiO3 (NBT-BT) solid solutions exhibit giant large-signal strain–elec…
View article: Reduction of the Lattice Strain with Increasing Field Amplitude in Polycrystalline BiFeO <sub>3</sub>
Reduction of the Lattice Strain with Increasing Field Amplitude in Polycrystalline BiFeO <sub>3</sub> Open
View article: Reduction of the Lattice Strain with Increasing Field Amplitude in Polycrystalline BiFeO <sub>3</sub>
Reduction of the Lattice Strain with Increasing Field Amplitude in Polycrystalline BiFeO <sub>3</sub> Open
View article: Unveiling Alternating Current Electronic Properties at Ferroelectric Domain Walls
Unveiling Alternating Current Electronic Properties at Ferroelectric Domain Walls Open
Ferroelectric domain walls exhibit a range of interesting electrical properties and are now widely recognized as functional 2D systems for the development of next‐generation nanoelectronics. A major achievement in the field is the developm…
View article: Unveiling AC electronic properties at ferroelectric domain walls
Unveiling AC electronic properties at ferroelectric domain walls Open
Ferroelectric domain walls exhibit a range of interesting electrical properties and are now widely recognized as functional two-dimensional systems for the development of next-generation nanoelectronics. A major achievement in the field wa…
View article: Piezoelectric Nonlinearity and Hysteresis Arising from Dynamics of Electrically Conducting Domain Walls
Piezoelectric Nonlinearity and Hysteresis Arising from Dynamics of Electrically Conducting Domain Walls Open
Macroscopic nonlinearity and hysteresis observed in the piezoelectric and dielectric responses of ferroelectric materials to external stimuli are commonly attributed to localized displacements of domain walls (DWs). The link between the ma…
View article: Thermal stability of the electromechanical properties in acceptor-doped and composite-hardened (Na1/2Bi1/2)TiO3–BaTiO3 ferroelectrics
Thermal stability of the electromechanical properties in acceptor-doped and composite-hardened (Na1/2Bi1/2)TiO3–BaTiO3 ferroelectrics Open
Lead-free relaxor ferroelectrics are promising candidates for next-generation piezoelectric high-power devices, such as ultrasonic motors, transformers, and therapeutic ultrasonics. These applications require hard ferroelectrics with a bro…