The Fe-doped BaTiO3 ceramics prepared by the solid-state-reaction method show simultaneously the ferromagnetic order with the magnetic transition temperature over 680 K and the ferroelectric order ...

Abstract. Electrical properties of acceptor (Mn, Mg or Mn+Mg)-doped BaTiO3 ceramic have been studied in terms of oxygen vacancy concentration, various doping levels and electrical degradation ...

It is also known by its Curie transition Tc of around 120 °C [4] which defines two dielectric states: ferroelectric state for T < Tc and paraelectric state for T ≥ Tc. In the present study, Cu-doped BaTiO 3 (BC x T) ceramics, with x = (0, 0.05, 0.1, 0.15, 0.2, 0.25 and 0.3), were produced by the sol gel process, The choice of this method of ...

Fe doped samples exhibit ferroelectric transition with transition temperature (T cF) in the range of 390 K for x=0.0–312 K for x=0.2. The dielectric constant, ε′ is found to …

Abstract. Simultaneous coexistence of room-temperature ferromagnetism and ferroelectricity in Fe-doped BaTiO3 (BTO) is intriguing, as such Fe doping into …

BaTiO3 nano-powder and the thin film deposited on a glass substrate were characterized using physicochemical and optical techniques. ... (K = Fe Co, Ni, Mn) doped BaTiO 3 ceramics. Ceram. Int. 48 ...

The polymorphism of BaTi 1−x Fe x O 3−δ solid solutions: 0 < x < 0.1, prepared by a sol–gel method, has been determined and presented in the form of a temperature–composition phase diagram for T > ∼1000 °C. With increasing x, the high temperature hexagonal polymorph is stabilised to increasingly lower temperatures.The temperature of the …

Fe-doped BaTiO 3 ceramics produced from powders prepared by solid state reaction at various processing parameters (temperature, time) were investigated and …

The formation of hexagonal phases in the Fe-doped BaTiO 3 ceramics was promoted by higher doping levels of Fe, higher sintering temperature, and longer …

Enhanced Photoelectrochemical Response of BaTiO 3 with Fe Doping: Experiments and First-Principles Analysis. Enhanced Photoelectrochemical Response of BaTiO 3 with Fe Doping: Experiments and First-Principles Analysis. Sahab Kaura. 2011, The Journal of Physical Chemistry C. See Full PDF Download PDF.

Undoped and 0.05 mol% Fe-doped β-Ga 2 O 3 crystals were grown by the edge-defined film-fed growth method. The purity of the raw materials, Ga 2 O 3 and Fe 2 O 3 powder, was 5N. Before the growth process, a mixture of 50% CO 2 and 50% Ar was used as the growth atmosphere. The crystal dimension was 10 mm × 10 mm with the (100) …

Additionally, Sn 4+-doping induce local micro-strain and a decreased Fe-O bond ordering. When Be 2+ was co-doped with Sn 4+-doped α–Fe 2 O 3 photoanodes, the conduction band recovered its original state, without localized impurities peaks, also a reduction in micro-strain and increased Fe-O bond ordering is observed.

Lead zirconate-titanate [Pb(Zr,Ti)O 3 (PZT)] is the most widely used piezoceramic material for electromechanical device applications. The toxicity and environmental impacts of lead have been known since the ancient times, 1 and many lead-free piezoelectrics were investigated over the past 50 years. 2 However, it was not until …

The results predict that the Cr-, Mn-, and Fe-doped BaTiO3 are candidates for ferromagnetic fabrication. Above all, Mn-doped BaTiO3 is the most promising, although carrier doping is necessary. View

Figure 1 Ground states of ferroelectric Fe-doped BaTiO3 with a spontaneous polarization (Ps) in an Fe2+-Fe3+ coexisting state in a the Fe2+ domain and b the Fe3+ domain. Photoinduced states with electron-hole pair under visible light: c electron injection is induced from the electron-filled Fe2+ (dz2) state to the conduction band (Ti-3d ...

The Fe-doped BaTiO3 ceramics prepared by the solid-state-reaction method show simultaneously the ferromagnetic order with the magnetic transition temperature over 680 K and the ferroelectric order ...

The effect of MnO2 doping on the structure, microstructure and dielectric properties of BaTiO3 has been studied. For this purpose MnO2-doped BaTiO3 ceramics have been prepared using a conventional ceramic method. The energydispersive X-ray spectroscopy investigations have revealed that the samples BaTiO3 + x wt. % MnO2 (x = 0.01; 0.1) are …

Abstract: Fe doping into BaTiO3, stabilizes the paraelectric hexagonal phase in place of the ferroelectric tetragonal one [P. Pal et al. Phys. Rev. B, 101, 064409 …

For Ce-doped BaTiO3, it was evident that the substitution of Ce for the Ba site slightly decreased the band gap from 2.081 eV to 2.023 eV, whereas the band gap was significantly decreased from 2. ...

In this work, spherical, urchin-like, pit-like Mg-doped BaTiO3 were prepared by hydrothermal method through adjusting the pH to 2, 4, 7, respectively. The structure characterizations of SEM and XRD showed that the particles sizes were 0.7–1.0 μm, and their crystal phases were cubic perovskite. According to the ICP results, the chemical …

Fe doped BaTiO 3 ceramics with giant permittivity and low dielectric loss were synthesized in N 2 /H 2 atmosphere started with BaTiO 3 powders and iron powders. XRD analysis exhibited the tetragonal-pseudocubic phase transition when the Fe content is 3 mol%.XPS spectra confirmed the iron oxides with mixed-valence structure of Fe 2+ /Fe …

Abstract. We report the investigation of crystal structure, magnetic and dielectric properties of BaTi1−x Fe x O 3 samples for x=0.0–0.3. The parent compound is found to crystallize in tetragonal structure while Fe doped samples are found to crystallize in the mixture of tetragonal and hexagonal phases but they are free from any impurity phase.

Here we doped BaSO 4 –BaTiO 3 by Cu, Fe, S, and N and coupled them with sucrose as a natural piezomaterial that was labeled as Cu–BaSO 4 –BaTiO 3, Fe–BaSO 4 –BaTiO 3, S–BaSO 4 –BaTiO ...

DOI: 10.1016/J.CERAMINT.2017.05.013 Corpus ID: 99595064; Preparation and structural characterization of Fe-doped BaTiO3 diluted magnetic ceramics @article{Gheorghiu2017PreparationAS, title={Preparation and structural characterization of Fe-doped BaTiO3 diluted magnetic ceramics}, author={Felicia Gheorghiu and Mantas …

The higher values of this parameter are known in the Fe doped BaTiO3 ceramics [28] and they are due to Fe 3+ and oxygen ion vacancies and/or other defects. BTFWO compound shows lower values (0.1-0 ...

Fe3+ doped BaTiO3 (BaTi1 − xFexO3) with x = 0.0, 0.2, 0.4 and 0.6 of Fe3+ contents was synthesized using the solid–state reaction method. The powders were calcinated at 1100 °C and sintered at 1200 °C for 6 h. The evolution of structural properties of the synthesized Fe3+-doped BaTiO3 particles was analyzed. X-ray diffraction patterns …

Doped BTO is widely studied because of its ferroelectricity and transition to semiconducting behavior upon suitable doping. Here, we report on the effect of Fe doping …

Co doped BaTiO3 catalyst showed better activity with only 0.5 mol. % doping than Fe and Ni doped BaTiO3 catalysts with maximum nitrobenzene conversion of 91% with 78% selectivity to azoxybenzene.

We report the ferroelectricity and ferromagnetism coexistence in the Fe-doped BaTiO 3. Our first-principles calculation based on the density-functional theory …

Remnant polarization (Pr) for pure BaTiO3 (BTO) has been found to be 7.50 µC/cm2 and further decreases with an increase in the Fe concentration. All Fe doped samples exhibit ferromagnetic ...

Fe-doped BaTiO3 is a promising multiferroics material due to its appealing physical properties and potential applications in sensors, transducers and non-volatile memories and multilayer capacitors. Herein, Fe-doped BaTiO3 nanocrystalline films were deposited on silicon substrates by chemical solution route. The relation between Fe …

To verify whether the frequencies affected the nanostructure, TEM, STEM, and EDS analyses were conducted. The expected morphology of the Fe-BTO …

These coincide with electronic instabilities of the Fe-doped 3C-BaTiO3-δ pseudocubic polymorph. Moreover, the distribution of iron dopants with frozen magnetic moments is found to be non-uniform.

Effect of atomic monolayer insertion on the performance of ferroelectric tunneling junction is investigated in SrRuO3/BaTiO3/SrRuO3 heterostrucutures. Based on first-principles calculations, the ...

XRD patterns of RawPowder, BT-Air, BT-Ar, and BT-1%H 2 are shown in Fig. 1.All samples are tetragonal phase. BT-Ar and BT-1%H 2 have different diffraction peak shapes, under the same low oxygen partial pressure, and the (002) diffraction peak intensity of BT-1%H 2 is weakened, which is related to the presence of H 2 in the sintering …

The focus of this review is doped-BaTiO3, a model lead-free ferroelectric. The effects of aliovalent doping on its dielectric, ferroelectric, and piezoelectric properties are reviewed and ...

In these first-principles calculations, the plane-wave energy cutoff was set as 500 eV.The Brillouin-zone (BZ) was sampled by 7 × 7 × 7 (pure BaTiO3) and 3 × 3 × 3 (doped BaTiO3) Monkhorst-Pack [23] k meshes. The relaxation of the electronic degrees of freedom will be stopped if the total energy change and the band structure energy change …