Ferroelectric enhancement in heterostructured ZnO∕BiFeO3-PbTiO3 film

Abstract

The authors have prepared heterostructured ZnO∕BiFeO3-PbTiO3 (BFO-PT) composite film and BFO-PT film on Pt∕Ti∕SiO2∕Si substrates by pulsed-laser deposition. The structure and morphologies of the films were characterized by x-ray diffraction (XRD) and scanning electron microscope. XRD results show that both films are perovskite structured last with different orientations. The leakage current density in the ZnO∕BFO-PT film was found to be nearly two orders of magnitude lower. This could be due to the introduced ZnO layer behaving as a Schottky barrier between the BFO-PT film and top electrodes. The dramatic ferroelectric enhancement in ZnO∕BFO-PT film is mostly ascribed to the improved insulation.

Structural changes and ferroelectric properties of BiFeO3–PbTiO3 thin films grown via a chemical multilayer deposition method

“…These leakage current values are significantly lower as compared to the reported room temperature values for most polycrystalline BiFeO 3 thin films 27,28 and most BF-xPT films reported thus far. 15,17,19,29,30 Figure 5 shows that at high fields, a relationship of the form log 10 J ∝ E 1/2 exists suggesting bulk dominated conduction i.e. Poole-Frenkel effect.…”

Nanoparticle–Plant Interactions: Two‐Way Traffic

“…CNTs have been assumed to regulate the gates of AQPs in the seed coat . AQPs are membrane proteins, and act as channels for water transfer across the cell membrane . In addition, small solutes or molecules including NPs may enter seeds as well as cell‐to‐cell contact through AQPs, endocytosis, plasmodesmata, and cell wall pores ( Figure ).…”

“…[174] AQPs are membrane proteins, and act as channels for water transfer across the cell membrane. [176] In addition, small solutes or molecules including NPs may enter seeds as well as cell-to-cell contact through AQPs, endocytosis, plasmodesmata, and cell wall pores (Figure 2). Little information is available on plant cell water channel gating; however, the available information suggests that CNTs play a role in accelerating water intake through AQPs.…”

Solution processing of morphotropic phase boundary BiFeO3‐PbTiO3 thin films with reduced conductivity for high room temperature switchable polarization

“…Several works involved accurate control of the preparation conditions, or explored the deposition of BFO and PTO layers alternately in a multilayer configuration, 23 the doping of the BFO with cations like Mn(II), 20,21,25 or the deposition of dielectric buffer layers on top of the substrate. 22,26,27 CSD has been successfully used for the fabrication of BFO-PTO thin films, because it offers mixing of the chemical constituents at the molecular level, thus providing good homogeneity and uniformity of the film, in addition to an accurate control of the film stoichiometry. However, most of the works on these CSD films use solutions synthesized with Bi(III)-nitrate, Fe(III)-nitrate, and Pb(II)-acetate as reagents, and 2-methoxyethanol 20,28 as the solvent, which is a teratogen chemical, thus leading to hazardous precursor solutions.…”