In recent years, experimental demonstration of ferroelectric tunnel junctions (FTJ) based on perovskite barriers has been reported. However, integrating these materials into conventional silicon memory technology remains challenging due to their lack compatibility with the complementary metal oxide semiconductor process (CMOS). This communication reports fabrication an FTJ a CMOS-compatible barrier Hf0.5Zr0.5O2 (6 unit cells thick) equally TiN electrode. Analysis by grazing angle incidence...

The present work reports the fabrication of a ferroelectric tunnel junction based on CMOS compatible 2.8 nm-thick Hf0.5Zr0.5O2 barrier. It presents comprehensive study electronic properties Pt/Hf0.5Zr0.5O2/Pt system by X-ray photoelectron and UV-Visible spectroscopies. Furthermore, two different scanning probe techniques (Piezoresponse Force Microscopy conductive-AFM) were used to demonstrate behavior ultrathin layer as well typical current-voltage characteristic device. Finally, direct...

We report on the electroforming in resistively switching nanocrosspoint devices made of a reactively sputtered TiO2 thin film between Pt and Ti/Pt electrodes, respectively. As most resistance materials, needs to be electroformed before it can switched. This paper presents compares current voltage controlled with regard polarity. show that current-driven negative polarities leads into switchable high resistive state without need for compliance. These an improved stability reliability bipolar...

Resistively switching memory cells (ReRAM) are strong contenders for next-generation non-volatile random access memories. In this paper, we present ReRAM on flexible substrates consisting of Ag/spin-on-glass/PEDOT:PSS (poly(3,4-ethylenedioxythiophene) polystyrene sulfonate). The complete cell is fabricated using a standard inkjet printer without additional process steps. Investigations the spin-on-glass insulating layer showed that low sintering temperatures sufficient good behavior,...

The (100) crystallographic plane is the most active facet of iridium dioxide (IrO2) for oxygen evolution reaction (OER). Pulsed laser deposition was used to grow IrO2 on a SrTiO3 substrate at temperature ranging from room 600 °C. Detailed structural and morphological characterization performed using AFM, XRD, X-ray reciprocal space mapping (RSM) unravel geometrical arrangement [IrO6] octahedra in thin films. It shown that symmetry mismatch between epitaxial film imposed an orthorhombic...

We report on the synthesis of photoferroic Cr3+-doped BaTiO3 nanoparticles with nominal Cr content ranging from 2-8 mol% by a microwave-assisted hydrothermal method. The absorption properties doped systems are significantly enhanced due to d-d band transition Cr3+/4+. structural materials examined basis lattice distortions given tolerance factor and microstrain. Raman scattering provides complementary information vibrations indicating softening longitudinal optic (LO) phonon mode located at...

We investigate Raman spectra (100 cm-1 to 3900 cm-1) of magnesium oxide nanoparticles with nominal sizes 10 nm, 20 40 50 and 300 nm. The crystal structure MgO prohibits first-order modes yet, there are numerous reports relatively intense peaks throughout the literature. signals at approximately 278 445 that were attributed by previous authors shown belong layers Mg(OH)2 formed on surface nanoparticles. Through an annealing process 400 °C in O2 atmosphere, we observe 3700 spectral region,...

Titanium dioxide thin films (30 nm) are deposited on platinized substrates by atomic layer deposition and locally studied conductive force microscopy showing repetitive bipolar resistive switching. Experiments using macroscopic copper top electrodes, which electroformed, switched, removed again from the TiO2–Pt stack, prove formation of local filaments with switching properties. The localized can be switched repetitively a resistance ratio 30. Our findings underline that Cu diffusion major...

Arbitrary patterns of heteroepitaxial multiferroic Bi2FeCrO6 nanostructures are fabricated by pulsed laser deposition using a simple nanostencil approach. The crystal orientation and the shape epitaxial controlled niobium-doped SrTiO3 substrates. Using advanced characterization techniques, it is established that material retains its ferroelectric magnetic properties at room temperature even submicrometer dimensions.

PtxIr100–x thin films (8 nm thick) were deposited on MgO(100) substrates by pulsed laser deposition at 600 °C. As shown X-ray diffraction and photoelectron spectroscopy analyses, the formation of fcc bulk surface PtIr solid solution was observed over whole compositional range despite large miscibility gap exhibited these elements below ca. 1000 Moreover, pole figures indicate that all exhibit a Pt(001)[010]//[010](001)MgO cube-on-cube epitaxial relationship, which is consistent with AFM...

Ferroelectric Fe3+Cr3+ codoped BaTiO3 nanopowders have been successfully synthesized by a microwave-assisted hydrothermal method. The results indicate that molar adjustment of the cations apparent optical absorption edge ferroelectrics can be red-shifted in comparison to undoped ferroelectric. interfacial charge transfer properties materials as evaluated through electrochemical impedance spectroscopy (EIS) and chronoamperometry reveal an average resistance. are then explored photocatalysts...

Brain-inspired computing and neuromorphic hardware are promising approaches that offer great potential to overcome limitations faced by current paradigms based on traditional von-Neumann architecture. In this regard, interest in developing memristor crossbar arrays has increased due their ability natively perform in-memory fundamental synaptic operations required for neural network implementation. For optimal efficiency, crossbar-based circuits need be compatible with fabrication processes...

The collagen meshwork plays a central role in the functioning of range tissues including cartilage, tendon, arteries, skin, bone and ligament. Because its importance function, it is considerable interest for studying development, disease regeneration processes. Here, we have used second harmonic generation (SHG) to image human on hundreds micron scale, developed numerical model quantitatively interpret images terms underlying structure tens nanometer scale. Focusing osteoarthritic changes...

We report the synthesis of {100} c facets exposed single‐crystalline BiFeO 3 ( BFO ) nanoplates, with thickness ranging from 20 to 160 nm and lateral size submicrometers, via a simple very rapid (1–2 min) microwave‐assisted hydrothermal approach. show that microwave treatment gives comparable improvement in crystallinity nanocrystals respect traditional processes while requiring significantly less time energy. In addition, we radiation power, reaction time, alkali concentration play...

Piezocatalytic reactions are generally excited by ultrasonication and, as such, should occur simultaneously with other catalytic caused different mechanisms such sonocatalysis or tribocatalysis. One of the main challenges is how to discriminate between these effects in a catalysis experiment and quantify each contribution. In order distinguish effects, we use nano- micro-particles piezoelectric barium titanate (BaTiO3) then compare their properties below close non-piezoelectric phase...

Abstract 2D materials, including transition metal dichalcogenides, are attractive for a variety of applications in electronics as well photonics and have recently been envisioned an appealing platform phonon polaritonics. However, their direct characterization the terahertz spectral region, interest retrieving, e.g., response, represents major challenge, due to limited sensitivity typical spectroscopic tools weak interaction such long‐wavelength radiation with sub‐nanometer systems. In this...

It has been suggested by several authors that SrTiO3 layers in –BaTiO3 superlattices should be tetragonal and ferroelectric at ambient temperatures, like the BaTiO3 layers, rather than cubic, as bulk SrTiO3, free-energy minimization requires continuity of polarization direction. A recent ab initio calculation constrained solutions to this structure. Surprisingly, our x-ray study shows are orthorhombic with 0.03% in-plane strain,  c-axis matching a- and b-axis better c-axis; strain energy...

The functional properties of two types barium strontium titanate (BST) thin film capacitor structures were studied: one set was made using pulsed-laser deposition (PLD) and the other chemical solution deposition. While initial observations on PLD films looking at behavior Tm (the temperature which maximum dielectric constant observed) Tc* (from Curie-Weiss analysis) suggested that paraelectric-ferroelectric phase transition progressively depressed in as BST thickness reduced, further work...

Among the techniques to reveal chemistry, structure, and dynamics of surfaces, tip-enhanced Raman spectroscopy (TERS) occupies a unique position for investigation nonmetallic nanomaterials: it provides wealth information even under ambient conditions with opportunity spatial resolution below diffraction limit. The high sensitivity optical near field surfaces has been exploited on self-assembled monolayers multiple occasions, yet, potential crystalline remains be unfolded. Using strontium...