A5013416301- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Superconductivity in MgB2 and Alloys
- Physics of Superconductivity and Magnetism
- Bone Tissue Engineering Materials
- Magnetic and transport properties of perovskites and related materials
- Microwave Dielectric Ceramics Synthesis
- Electronic and Structural Properties of Oxides
- Liquid Crystal Research Advancements
- Iron-based superconductors research
- Dental materials and restorations
- Advanced Condensed Matter Physics
- Acoustic Wave Resonator Technologies
- Boron and Carbon Nanomaterials Research
- Dental Implant Techniques and Outcomes
- Magnetism in coordination complexes
- Lanthanide and Transition Metal Complexes
- Advanced ceramic materials synthesis
- Surfactants and Colloidal Systems
- Dielectric properties of ceramics
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Laser-Ablation Synthesis of Nanoparticles
- Magnetic Properties of Alloys
- Semiconductor materials and devices
National Institute of Materials Physics
2016-2025
Material Physics Center
2004-2009
Institute for Studies and Power Engineering (Romania)
2001-2004
NTL Institute for Applied Behavioral Science
2002
Electrode interface is a key element in controlling the macroscopic electrical properties of ferroelectric capacitors based on thin films. In case epitaxial ferroelectrics, electrode essential leakage current and polarization switching, two important elements read/write processes nonvolatile memories. However, relation between bound charges electronic interfaces not yet well understood. Here we show that are height potential barriers at Pb(Zr,Ti)O3 BaTiO3 The results suggest set to value...
In this study, nano-BaTiO3 (BTO) powders were obtained via the solvothermal method at different reaction times and investigated using transmission electron microscopy (TEM), X-ray diffraction (XRD) Raman spectroscopy. The results compared with those for a larger crystallite size BTO powder (BTO-m). sizes of cuboid crystallites (as determined by XRD TEM) ranged from about 18 to 24 nm, depending on time. evolution temperature structure parameters nano-BTO was monitored means spectroscopy no...
The compensation of the depolarization field in ferroelectric layers requires presence a suitable amount charges able to follow any variation polarization. These can be free carriers or charged defects located material coming from electrodes. Here we show that self-doping phenomenon occurs epitaxial, tetragonal films Pb(Zr0.2Ti0.8)O3, consisting generation point (vacancies) acting as donors/acceptors. are introducing partly compensate occurring film. It is found concentration introduced by...
The orientation of polarization in ferroelectric thin films is important for applications these materials nonvolatile memory and field-effect transistors with gates, catalysis photocatalysis. One means control to choose a well defined substrate, but the influence substrate's electronic properties on not understood. In this investigation model systems, experimental findings are integrated electrostatic models determine magnitudes orientations interfacial electric fields that useful setting epilayer.
In this work we report our studies concerning the synthesis and characterisation of a series imine derivatives that incorporate 2-phenylpyridine (2-ppy) core. These were used in cyclometalating reactions platinum(II) or palladium(II) order to prepare several complexes with liquid crystalline properties. Depending on starting materials as well solvents employed, different metal obtained, some them showing both behaviour luminescence properties at room temperature. It was found that, even if...
The effects of the bonding mechanism and band alignment in a ferroelectric (FE) ${\mathrm{BaTiO}}_{3}$/ferromagnetic ${\mathrm{La}}_{0.6}{\mathrm{Sr}}_{0.4}{\mathrm{MnO}}_{3}$ heterostructure are studied using x-ray photoelectron spectroscopy first-principles calculations. lineup at interface is determined by combination bending polarization-induced modification core-hole screening. A Schottky barrier height for electrons $1.22\ifmmode\pm\else\textpm\fi{}0.17$ eV obtained case downwards FE...
Abstract Pb(Zr,Ti)O 3 (PZT) is the most common ferroelectric (FE) material widely used in solid‐state technology. Despite intense studies of PZT over decades, its intrinsic band structure, electron energy depending on 3D momentum k, still unknown. Here, Pb(Zr 0.2 Ti 0.8 )O using soft‐X‐ray angle‐resolved photoelectron spectroscopy (ARPES) explored. The enhanced escape depth this photon range allows sharp definition out‐of‐plane k and thereby full structure. Furthermore, problem sample...
Individually accessible polarization states in multilayer ferroelectric-insulator structures for multi-bit memories.
A series of pyridinium salts with various counterions (Br−, NO3−, BF4−, PF6−, OTf− and SCN−) different spacer chain lengths, which display a nematic phase, have been designed prepared. They are derived from 4-hydroxypyridine possess two mesogenic cyanobiphenyl groups attached to the unit via flexible long alkyl (6, 9, 10). These exhibit solely phase thermal range influenced by counterion employed length.
Cotton/polyester woven fabrics were functionalized with ZnO thin films or nanoparticles by pulsed laser deposition, using a KrF* excimer source. Depending on the number of applied pulses, well-separated (for 10 pulses) compact 100 deposited. The synthesized nanostructures evaluated morphologically scanning electron microscopy and atomic force microscopy, physico-chemically x-ray diffraction functionally contact angle method. By modifying ambient gas nature pressure in deposition chamber,...