577 Results Found

The structural, electronic, magnetic, and optical properties are explored in the G-type antiferromagnetic BiFeO₃ system by replacing the Fe cation with transition metals to form the BiFe_0.834X_0.166O₃ compound (where X = Mn, Co, or Ni) by using first-...

The magnetic, electric, and optical properties in Tb-doped BiFeO₃ nanoparticles as functions of size and doping concentrations were investigated using a microscopic model, taking into account both linear and quadratic magnetoelectric (ME) coupling. W...

We investigate the interfacial chemistry of secondary Fe₂O₃ phases formed in a BiFeO₃ (BFO) layer in BFO/ La_0.67Sr_0.33MnO₃ (LSMO)/SrTiO₃ (STO) heterostructures. A combination of high-resolution spherical aberration corrected scanning TEM and spectros...

Enhancement in the efficiency of a TiO₂ dye-sensitized solar cell (DSSC) has been demonstrated by introducing ferromagnetic perovskite BiFeO₃ and controlling the magnetic field, which induces two-dimensional material-like properties in the bulk of th...

Pure BiFeO₃ and heterostructured BiFeO₃/BiFe_0.95Mn_0.05O₃ (5% Mn-doped BiFeO₃) thin films have been prepared by a chemical deposition method. The band structures and photosensitive properties of these films have been investigated elaborately. Pure BiF...

Thin films of BiFeO₃, VO₂, and BiFeO₃/VO₂ were grown on SrTiO₃(100) and Al₂O₃(0001) monocrystalline substrates using radio frequency and direct current sputtering techniques. To observe the effect of the coupling between these materials, the surface...

This paper reports an XPS surface study of pure phase BiFeO${}_3$ thin film produced and later etched by pure argon ions. Analysis of high-resolution spectra from Fe $2p$, Bi $4f$ and $5d$, O $1s$, and the valence band, exhibited mainly Fe${}^{3+}$ and Bi${}^{3+}$ components,...

Complex dielectric and impedance spectroscopic studies have been carried out in a detailed manner on the system comprising of Bi₂Fe₄O₉-BiFeO₃ composite particles dispersed in a α-Fe₂O₃ matrix as prepared using ball milling and controlled anneal...

BiFeO₃/BaTiO₃ bi-layer thick films (~1 μm) were deposited on Pt/Ti/SiO₂/(100) Si substrates with LaNiO₃ buffer layers at 500 °C via a rf magnetron sputtering process. X-ray diffraction (XRD) analysis revealed that both BiFeO₃ and BaTiO₃ layers have a...

This paper presents a simple and optimized metal organic chemical vapor deposition (MOCVD) protocol for the deposition of perovskite BiFeO₃ films on silicon-based substrates, in order to move toward the next generation of lead-free hybrid energy harv...

The catalytic treatment of wastewater serves as an effective way to solve the problem of water pollution, in which non-homogeneous Fenton catalysts are widely used. However, the activity enhancement of non-homogeneous Fenton catalysts still remains a...

Owing to their remarkable success in photocatalytic applications, multiferroic BiFeO₃ and its derivatives have gained a highly promising position as electrode materials for future developments of efficient catalysts. In addition to their appropriate...

In this work, a BiFeO₃ film is prepared via a facile sol–gel method, and the effects of the relative humidity (RH) on the BiFeO₃ film in terms of capacitance, impedance and current–voltage (I–V) are explored. The capacitance of the...

Nanocomposite films of BiFeO₃-Bi₂Fe₄O₉ were fabricated on a sapphire substrate Al₂O₃ using the method of gas discharge high-frequency cathodic sputtering of a ceramic target with a stoichiometric composition in an oxygen atmosphere. The results of th...

In this work, oxygen vacancies were introduced onto the surface of BiFeO₃ nanoparticles by NaBH₄ reduction method to yield oxygen-deficient BiFeO_3−x samples. Comprehensive analysis on the basis of high-resolution transmission electron microscopy (HRT...

The 10 at.% Co-substituted BiFeO₃ films (of thickness 50 nm) were successfully prepared by radio frequency (r.f.) magnetron sputtering on SrTiO₃ (100) substrates with epitaxial relationships of [001](001)Co-BiFeO₃//[001](001)SrTiO₃. In this study, a...

The atomic layer deposition method allows for the production of a thin film with a high aspect ratio on the uneven surface of titanium dioxide nanotubes TiO₂(Nt). A modified BiFeO₃/TiO₂(Nt)/Ti (BFOT) structure with controllable electrical characteris...

The purpose of this paper is to study the effect of nano-bismuth ferrite (BiFeO₃) on the electrical properties of low-density polyethylene (LDPE) under magnetic-field treatment at different temperatures. BiFeO₃/LDPE nanocomposites with 2% mass fracti...

The dielectric function and the bandgap of BiFe_0.5Cr_0.5O₃ thin films were determined from spectroscopic ellipsometry and compared with that of the parent compounds BiFeO₃ and BiCrO₃. The bandgap value of BiFe_0.5Cr_0.5O₃ is lower than that of BiFeO₃ an...

In functional oxide films, different electrical/mechanical boundaries near film surfaces induce rich phase diagrams and exotic phenomena. In this paper, we review some key points which underpin structure, phase transition and related properties in Bi...

Perovskite-type materials containing Bi³⁺ cations at A sites are interesting from the viewpoints of applications and fundamental science as the lone pair of Bi³⁺ cations often stabilizes polar, ferroelectric structures. This can be illustrated by a l...

We investigate the origin of ferroelectricity in the BiFeO₃–LaFeO₃ system in rhombohedral R3c and tetragonal P4mm symmetries by ab initio density functional theory calculations and compare their electronic features with paraelectric orthorhombi...

In this work, Er-doped BiVO₄/BiFeO₃ composites are prepared using the sonochemical process with a difference of rare earth loading compositions. The crystallinity and chemical and morphological structure of as-synthesized samples were investigated vi...

In this work, pure BiFeO₃ and samples doped with different concentrations of chromium were synthesized to improve the optical properties and efficiency of solar cells based on BiFeO₃. The sol-gel method was used for synthesis due to its ability to pr...

Two Planar Pt electrodes with an inter-electrode distance of about 100 nm were fabricated at the surface of BiFeO₃ thin films, which allow the manipulation of ferroelectric domain switching at nanoscale. This electrode configuration was pursued to st...

To be CMOS-compatible, a low preparation temperature (<500 °C) for ferroelectric films is required. In this study, BiFeO₃ films were successfully fabricated at a low annealing temperature (<450 °C) on aluminum foils by a metal–org...

BiFeO₃ and EuFeO₃ are some of the most studied ferrites and part of the larger category of multiferroic and magnetic compounds. The instabilities reported for BiFeO₃ that hinder its use in practical applications can be overcome by substitution with r...

BiFeO₃ fibers were prepared by the Laser Floating Zone (LFZ) technique using different growth speeds. The structural characterization of the samples was undertaken using X-ray diffraction (XRD) and Raman spectroscopy, the morphological characterizati...

This current study assessed the impacts of morphology adjustment of perovskite BiFeO₃ (BFO) on the construction and photocatalytic activity of P-infused g-C₃N₄/U-BiFeO₃ (U-BFO/PCN) heterostructured composite photocatalysts. Favorable formation of U-B...

BiGaO₃ doped BiFeO₃–BaTiO₃ ceramics were prepared by the traditional solid-phase synthesis process. The phase analysis, microstructure, piezoelectric, ferroelectric, dielectric properties, and thermal stability of 0.7BiFeO₃-(0.3 − x)BaTiO₃-xBiGaO₃ (A...

Bismuth ferrite (BiFeO₃, BFO) is a promising multiferroic material, but its optoelectronic potential is limited by a wide bandgap and charge recombination. Here, we report the sol–gel synthesis of Co-doped BiFeO₃/Bi₂₅FeO₄₀ heterostructured nano...

Superlattice-structured epitaxial thin films composed of Mn(5%)-doped BiFeO₃ and BaTiO₃ with a total thickness of 600 perovskite (ABO₃) unit cells were grown on single-crystal SrTiO₃ substrates by pulsed laser deposition, and their polarization and d...

In this study, MOF/BiFeO₃ composite (MOF, metal-organic framework) has been synthesized successfully through a one-pot hydrothermal method. The MOF/BiFeO₃ composite samples, pure MOF samples and BiFeO₃ samples were characterized by X-ray diffraction...

Lead-free electroceramics represent an emerging area of research that has the potential to enable new green advances in electronics. Research has mainly focused on the development of new piezoelectric materials for replacing lead containing oxides ex...

BiFeO₃ (BFO) films on highly oriented pyrolytic graphite (HOPG) substrate were obtained by the atomic layer deposition (ALD) method. The oxidation of HOPG leads to the formation of bubble regions creating defective regions with active centers. Chemis...

In the present work, a facile one-step methodology was used to synthesize honeycomb-like BiFeO₃/g-C₃N₄ composites, where the well-dispersed BiFeO₃ strongly interacted with the hg-C₃N₄. The 10BiFeO₃/hg-C₃N₄ could completely degrade RhB under visible l...

Co³⁺ doping in BiFeO₃ is expected to be an effective method for improving its magnetic properties. In this work, pristine BiFeO₃ (BFO) and doped BiFe_1-xCo_xO₃ (BFC_xO, x = 0.01, 0.03, 0.05, 0.07 and 0.10) composite thin films were successfully synthesi...

Dielectric capacitors have been widely studied because their electrostatic storage capacity is enormous, and they can deliver the stored energy in a very short time. Relaxor ferroelectrics-based dielectric capacitors have gained tremendous importance...

Ceramic samples of Bi_1−xHo_xFeO₃, where x = 0.00–0.50, with a modifier concentration variation step ∆x = 0.05–0.10, were prepared by a two-step solid-phase synthesis followed by sintering using conventional ceramic technology....

Addressing the limitations of poor piezoelectric photocatalytic activity and insufficient magnetic recovery in pure BiFeO₃ nanoparticles, Gd and Zr co-doped BiFeO₃ nanoparticles were synthesized via the sol-gel method. The structural characterization...

The improvement of ferromagnetic properties is critical for the practical application of multiferroic materials, to be exact, BiFeO₃ (BFO). Herein, we have investigated the evolution in the structure and morphology of Ho or/and Mn-doped thin films an...

By a sol–gel method, a BiFeO₃ (BFO) capacitor is fabricated and connected with the control thin film transistor (TFT). Compared with a control thin-film transistor, the proposed BFO TFT achieves 56% drive current enhancement and 7–28% subthreshold sw...

BiFeO₃/Reduced Graphene Oxide (BFO/RGO) composites have been fabricated by a simple hydrothermal method. The X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman, and X-ray photoelectron spectroscopy (XPS) analysis reveal that graphene...

BiFeO₃–based ceramics possess an advantage over large spontaneous polarization and high Curie temperature, and are thus widely explored in the field of high–temperature lead–free piezoelectrics and actuators. However, poor piezoelec...

This review provides a comprehensive examination of the state-of-the-art research on resistive switching (RS) in BiFeO₃ (BFO)-based memristive devices. By exploring possible fabrication techniques for preparing the functional BFO layers in memristive...

BiFeO₃ (BFO) films with ferroelectricity are the most promising candidates regarding the next generation of storage devices and sensors. The comprehensive understanding of ferroelectric switchable properties is challenging and critical to robust doma...

The use of lead-free ceramic film materials with positive temperature coefficient of resistivity (PTCR) is widespread in temperature heaters and sensors in micro-electromechanical systems. In this research, the out of plane transport properties of th...

BiFe_1−xCr_xO_3, (0 ≤ x ≤ 10) nanoparticles were prepared through the sol–gel technique. The synthesized nanoparticles were characterized using various techniques, viz., X-ray diffraction, high-resolution field emission scanning electr...

Ceramics in the system (Bi_0.5K_0.5)TiO₃-BiFeO₃ have good electromechanical properties and temperature stability. However, the high conductivity inherent in BiFeO₃-based ceramics complicates measurement of the ferroelectric properties. In the present w...

The BiFeO₃-BaTiO₃ (BF-BT) ceramics were here prepared through the solid-state reaction of Bi₂O₃, Fe₂O₃ and nano-sized BT powders. The crystal structures and piezoelectric properties were investigated in both quenched (AQ) and slowly cooled (SC) 0.7BF...