Recent development in lead-free perovskite piezoelectric bulk materials

Multiferroic bismuth ferrite-based materials for multifunctional applications: Ceramic bulks, thin films and nanostructures

Bismuth ferrite (BiFeO3), a perovskite material, rich in properties and with wide functionality, has had a marked impact on the field of multiferroics, as evidenced by the hundreds of articles published annually over the past 10 years. Studies from the very early stages and particularly those on polycrystalline BiFeO3 ceramics have been faced with difficulties in the preparation of the perovskite free of secondary phases. In this review, we begin by summarizing the major processing issues and clarifying the thermodynamic and kinetic origins of the formation and stabilization of the frequently observed secondary, nonperovskite phases, such as Bi25FeO39 and Bi2Fe4O9. The second part then focuses on the electrical and electromechanical properties of BiFeO3, including the electrical conductivity, dielectric permittivity, high-field polarization, and strain response, as well as the weak-field piezoelectric properties. We attempt to establish a link between these properties and address, in particular, the macroscopic response of the ceramics under an external field in terms of the dynamic interaction between the pinning centers (e.g., charged defects) and the ferroelectric/ferroelastic domain walls.

BiFeO3 Ceramics: Processing, Electrical, and Electromechanical Properties

Recent developments in luminescent coordination polymers: Designing strategies, sensing application and theoretical evidences

Raman scattering study of polycrystalline magnetoelectric BiFeO3

Structural, magnetic, dielectric and optical properties of nickel ferrite nanoparticles synthesized by co-precipitation method

Dielectric, magnetic, and magnetoelectric properties of Ti substituted bismuth ferrite (BiFeO3) ceramic synthesized by solid state reaction are reported. Ti substitution for Fe in BiFeO3 increased the room temperature electrical resistivity by approximately six orders of magnitude and also increased the dielectric constant and reduced the loss tangent. The remanent polarization, coercive field, and maximum polarization were 0.081μC∕cm2, 2.571kV∕cm, and 0.658μC∕cm2, respectively at 20kV∕cm. An anomaly in the dielectric constant and loss tangent around Neel temperature was observed. The ferroelectric and magnetic hysteresis loops were measured which are not really saturated in BiFe0.75Ti0.25O3 compound and represented a partial reversal. The magnetoelectric coupling between electric dipoles and magnetic dipoles at room temperature was demonstrated by measuring the effect of magnetic poling on ferroelectric hysteresis loop and the change in the dielectric constant with the external magnetic field.

Study of room temperature magnetoelectric coupling in Ti substituted bismuth ferrite system

Improvement in magnetic behaviour of cobalt doped magnesium zinc nano-ferrites via co-precipitation route

Multiferroic, magnetoelectric and optical properties of Mn doped BiFeO3 nanoparticles

Single-phase BiFe1−xMnxO3 multiferroic ceramics have been synthesized by rapid liquid phase sintering method to study the influence of Mn substitution on their crystal structure, dielectric, magnetic, and ferroelectric behaviors. From XRD analysis it is seen that Mn substitution does not affect the crystal structure of the BiFe1−xMnxO3 system. An enhancement in magnetization was observed for BiFe1−xMnxO3 ceramics. However, the ferooelectric hysteresis loops were not really saturated, we observed a spontaneous polarization of 10.23μC∕cm2 under the applied field of 42kV∕cm and remanent polarization of 3.99μC∕cm2 for x=0.3 ceramic.

Manoj Kumar

Papers

Structural, magnetic, dielectric and optical properties of nickel ferrite nanoparticles synthesized by co-precipitation method

Study of room temperature magnetoelectric coupling in Ti substituted bismuth ferrite system

Improvement in magnetic behaviour of cobalt doped magnesium zinc nano-ferrites via co-precipitation route

Multiferroic, magnetoelectric and optical properties of Mn doped BiFeO3 nanoparticles

Rapid liquid phase sintered Mn doped BiFeO3 ceramics with enhanced polarization and weak magnetization