A5078938184- Ferroelectric and Piezoelectric Materials
- Acoustic Wave Resonator Technologies
- Electronic and Structural Properties of Oxides
- Microwave Dielectric Ceramics Synthesis
- Multiferroics and related materials
- Diamond and Carbon-based Materials Research
- Photorefractive and Nonlinear Optics
- Metal and Thin Film Mechanics
- Dielectric properties of ceramics
- Advanced Photocatalysis Techniques
- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Surface Roughness and Optical Measurements
- Semiconductor materials and devices
- Analytical Chemistry and Sensors
- Glass properties and applications
- Copper-based nanomaterials and applications
- Laser Material Processing Techniques
- Laser-induced spectroscopy and plasma
- Perovskite Materials and Applications
- Transition Metal Oxide Nanomaterials
- Nonlinear Optical Materials Studies
- Plasma Diagnostics and Applications
- Mass Spectrometry Techniques and Applications
- Liquid Crystal Research Advancements
National Institute for Laser Plasma and Radiation Physics
2012-2023
National Research and Development Institute on Occupational Safety
2005-2012
The elastic response of (Ba,Ca)(Ti,Zr)O3 at compositions where the piezoelectric effect is maximized has been measured by different methods between 1 Hz and 250 kHz compared with that PZT middle its morphotropic phase boundary. In all cases, compliance peaked border tetragonal (T) orthorhombic (O) phases, intermediate T low-temperature rhombohedral phase. anomalies do not exhibit dependence on frequency their relative amplitude 200–300 times larger than losses, demonstrating they are...
In this work, we report the synthesis of functional biocompatible piezoelectric (1 – x)Ba(Ti0.8Zr0.2)TiO3–x(Ba0.7Ca0.3)TiO3, x = 0.45 (BCZT45), thin films with high properties. Pulsed-laser-based techniques, classical pulsed-laser deposition and matrix-assisted evaporation, were used to synthesize BCZT45 films. The second technique was employed in order ensure growth on polymer flexible Kapton substrates. grown by both techniques show similar structural properties coefficient coupling...
It is shown that the dielectric and piezoelectric properties of Ba(Ti0.8Zr0.2)O3-x(Ba0.7Ca0.3)TiO3 (x = 0.45) (BCTZ 45) epitaxial thin films have a nontrivial dependence on film thickness. BCTZ 45 with different thicknesses (up to 400 nm) been deposited SrTiO3 by pulsed laser deposition investigated combined techniques: conventional off-axis X-ray diffraction, high resolution transmission electron microscopy piezoforce microscopy. The changes occurring in when their thickness increases...
Epitaxial (1 – x)Ba(Ti0.8Zr0.2)TiO3 x(Ba0.7Ca0.3)TiO3, x = 0.45 (BCZT 45), thin films have been deposited on (001) SrTiO3 (STO) and (001/100) SrLaAlO4 (SLAO) substrates by pulsed laser deposition. X-ray diffraction high-resolution transmission electron microscopy (HRTEM) confirmed the epitaxial growth of films. A high structural quality has evidenced for BCZT/STO Geometric phase analysis (GPA) associated with HRTEM enabled us to obtain microstrain in-plane out-of-plane lattice parameter...
Tuning the intrinsic structural and stoichiometric properties by different means is used for increasing green energy production efficiency of complex oxide materials. Here, we report on formation self-assembled nanodomains their effects photoelectrochemical (PEC) LaFeO3 (LFO) epitaxial thin films as a function layer’s thickness. The variation with film’s thickness parameters such in-plane out-of-plane crystalline coherence length coexistence orientation—<100>SrTiO3//<001> LFO,...
Laser pulse processing of surfaces and thin films is a useful tool for amorphous crystallization, surface nanostructuring, phase transformation modification physical properties films. Here we show the effects nanostructuring produced at under GeTiO through laser pulses using fluences 10-30 mJ/cm(2). The were obtained by RF magnetron sputtering with 50:50 initial atomic ratio Ge:TiO2. irradiation was performed fourth harmonic (266 nm) Nd:YAG laser. laser-induced results in two effects, first...
BiFeO3 is one of the most promising multiferroic materials but undergoes two major drawbacks: low dielectric susceptibility and high loss. Here we report in-plane permittivity (ε' ∼2500) loss (tan δ < 0.01) obtained on Bi0.95Y0.05FeO3 films epitaxially grown SrTiO3 (001) by pulsed laser deposition. High resolution transmission electron microscopy geometric phase analysis evidenced nanostripe domains with alternating compressive/tensile strain slight lattice rotations. Nanoscale mixed...
Due to its physical and chemical properties, the n-type tungsten oxide (WO3) semiconductor is a suitable photoanode for water decomposition reaction. The responses of photoelectrochemical PEC water-splitting properties as an effect structural optical changes WO3 thin films, well nature electrolyte solutions, were studied in this work. thins films have been obtained by pulsed laser deposition (PLD) on silicon (Si(001)) covered with platinum substrates using three different wavelengths. As XRD...
Abstract We report significant photoelectrochemical activity of Y-doped BiFeO 3 (Y-BFO) epitaxial thin films deposited on Nb:SrTiO substrates. The Y-BFO photoanodes exhibit a strong dependence the photocurrent values thickness films, and implicitly induced strain. peculiar crystalline structure structural changes after PEC experiments have been revealed by high resolution X-ray diffraction transmission electron microscopy investigations. coherence breaking due to small ionic radius...