Interest in doped BaTiO 3 (BTO) single crystals has increased in the past decade after seminal results showing that (001) cut and poled crystals doped at the Ti 4+ site with either Fe 3+ or Mn 3+ were shown to have large and recoverable electrostrain of up to 0.8%, significantly higher than approximately 0.05% which can be obtained reversibly ...
The structural, ferroelectric and magnetic properties of bulk perovskite Fe-doped BaTiO3 (BFTO) prepared by standard solid-state reaction have been investigated. X-ray diffraction (XRD) identifies ...
Here, we investigate its origin and show that Fe-doped BTO has a mixed-phase room-temperature multiferroicity, where the ferromagnetism comes from the majority …
0. 9 9 BaTiO 3 − x Fe 2 O 3 − y Nb 2 O 5 ceramics (x + y = 1 mol.%, x: y = 1:3, 2:3, 3:2, 3:1) were successfully prepared using the traditional solid-phase sintering method. The effects of the proportion doping (Fe/Nb) components on various properties of BaTiO 3 ceramics were studied. The X-ray diffraction showed that all solid solutions have the single cubic phase at room …
The ionic radii of Fe ions is very similar to the Ti ion (0.605 Å) and much smaller than that of the Ba ion (1.35 Å); it is reasonable to imply that TM ions substitute into the Ti sites of BaTiO
Fe doped samples exhibit ferroelectric transition with transition temperature (TcF) in the range of 390 K for x =0.0–312 K for x =0.2. The dielectric constant, ε′ is found to decrease …
In the present work structural, electrical, magnetic and magnetodielectric properties of BaTi1−xFexO3 (0%≤x≤10%) ceramics have been investigated. X-ray diffraction (XRD) …
A wide range of the interesting properties of electroceramics Ba0.996La0.004Ti0.999O3 (BLT4) undoubtedly deserves differentiation and optimization.
In this study, we chose Fe-doped BaFe x Ti 1-x O 3 (with x = 0.4, 0.5, and 0.6) and studied its structural and electrical properties via impedance spectroscopy. The materials were prepared via the solid-state reaction. As such, we can discuss the manner in which Fe doping affects ... BaTiO3, indicating ferroelectric behavior. The doping of Fe ...
3.2 Ferroelectric properties. The piezoelectric properties of BT and Fe-doped BT ceramics are listed in Table 1.Internal Fe doping significantly reduced the piezoelectric coefficient d 33 from 236 to 165 pC/N and the electromechanical coupling coefficient k p from 0.39 to 0.25. However, the quality factor Q m exhibited an increasing trend from 260 to 716, indicative of …
In this work, we present a study of the structural, optical, ferroelectric and dielectric properties of BaTiO 3 doped with diluted quantities of Fe 3+ (x = atomic fraction; x = 0, 0.01, 0.02, 0.04; BaFe x Ti 1-x O 3).Pure and doped BaTiO 3 were prepared through mechanical milling and conventional solid-state reaction methods. The XRD analysis revealed the …
The structural, ferroelectric and magnetic properties of bulk perovskite Fe-doped BaTiO3 (BFTO) prepared by standard solid-state reaction have been investigated. X-ray …
Electrical Properties of Fe-Doped BaTiO3. April 2006; ... in the literature when Co 2+ is present in the Ti site. 48 Masóet al. 49 have found that the c/a tetragonality of Fe-doped BTO decreases ...
The doping of magnetic element Fe brings about ferromagnetic order for the samples, and the measured magnetic moment for each Fe atom increases from 0.70 μ B to 1.55 μ B in BFTO samples. The origin of ferromagnetism of the BFTO samples should be attributed to the double exchange interactions of Fe 3+ – O 2 – Fe 4+ ions.
The Fe-doped BaTiO3 ceramics with various iron concentration were prepared by the conventional ceramic technology. Structure of the samples was studied by X-ray diffraction, scanning electron ...
Fe doped BaTiO3 ceramics with giant permittivity and low dielectric loss were synthesized in N2/H2 atmosphere started with BaTiO3 powders and iron powders. XRD analysis exhibited the tetragonal ...
Xu et al. predicted [33] that the energy of the ferromagnetic order of a Fe-doped BTO system (x = 0.125) is lower than that of the antiferromagnetic order, and this was verified experimentally. ... Insulator-metal transition and anomalous sign reversal of the dominant charge carriers in perovskite BaTiO3−δ ...
Iron-ion-doped barium titanate (BaTi O 3) nanoparticles have been synthesized through a chemical route using polyvinyl alcohol. The polymer serves as a surfactant to encapsulate the cationic species in divided groups during the reaction that confines the size and morphology of the specimen.
We have performed first principles calculations of Fe-doped BaTiO3 and SrTiO3. Dopant formation energy, structure distortion, band structure and density of states have been computed.
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 ...
Crystals, 2021. Development of lead-free BaTiO3/NiFe2O4/BaTiO3 (BTO/NFO/BTO) trilayer structure thin films is significant for the realization of eco-friendly and implantable microelectromechanical systems (MEMS)-based devices.
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 tetragonal to cubic …
The structural, magneto-optical, optical, and magnetic properties of BaTi 1 − x Fe x O 3 films grown by pulsed laser deposition onto MgO (100) have been investigated for Fe content, x = 0.15 , 0.2, 0.3, and 0.5.
Iron-ion-doped barium titanate (BaTiO3) nanoparticles have been synthesized through a chemical route using polyvinyl alcohol. The polymer serves as a surfactant to encapsulate the cationic species ...
The Fe-doped BaTiO 3 ceramics prepared by the solid-state-reaction method show simultaneously the ferromagnetic order with the magnetic transition temperature over 680 K …
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 ...
In all Fe-doped BTO samples, the grains exhibited rectangular and hexagonal shape. The average grain size were increased from 1.5 to 3.5 µm with increasing the Fe content from x=0% to x=10%. The dielectric constants of Fe-doped BaTiO 3 multiferroic ceramics exhibited a decrease with Fe concentration. This may be due to the less polarizability ...
Here, we report the structural, electronic, magnetic and ME coupling of 3.5, 5 and 7.5 mol% cobalt doped BaTiO3(BTO) ceramics.
The dopant formation energy is found to be 6.8 eV and 6.5 eV for Fe-doped BaTiO 3 and SrTiO 3 respectively. The distances between Fe impurity and its nearest O atoms and between Fe atom and Ba or Sr atoms are smaller than those of the corresponding undoped bulk systems. The Fe defect energy band is obtained, which mainly originates from Fe 3d ...
The total DOS of the BaY x Ti 1-x O 3 (Y˭Fe/Co, x = 0, 0.125, 0.25, 0.375, 0.5) system are plotted in Fig. 3.Here, Fig. 3 a is the total DOS of the BaFe x Ti 1-x O 3 system and Fig. 3 b is the total DOS of the BaCo x Ti 1-x O 3 system. In consistent with the energy band structures depicted in Fig. 2, there is no band gap in the Fe/Co–doped BaTiO 3 system. . …
The crystal structure of any system has a dependence on the co-ordination number and the states of ionisation of constituent elements. In BTO, the co-ordination numbers of Ba 2+ and Ti 4+ are 12 and 6 respectively. In doped samples, Ti 4+ is replaced by Mn 4+ which has an identical co-ordination number; Ba 2+ is replaced by Fe 3+ as per the reactants used …
to dilute Fe-doped samples with less vacancy deficiency, the electrical property of densely doped samples may be more conductive owing to more dopant and vacancies.10 In this paper, we report the magnetic and electrical prop-erties of post-annealed (PA) 6H-Ba(Ti 1 xFe x)O 3 d (x¼1/6, 1/3) based on detailed structure investigations. In combina-