Structural phase relations in perovskite-structured BiFeO3-based multiferroic compounds

Abstract

Abstract:In this review, the state of the art in understanding the structural phase relations in perovskite-structured BiFeO 3 -based polycrystalline solid solutions is presented and discussed. Issues about the close relation between the structural phase and overall physical properties of the reviewed systems are pointed out and discussed. It is shown that, by adjusting the structural symmetric arrangement, the ferroelectric and magnetic properties of BiFeO 3 -based polycrystalline solid solutions can be tuned to find specific multifunctional applications. However, an intrinsic mechanism linking structural arrangement and physical properties cannot be identified, revealing that this subject still deserves further discussion and investigation.

Dielectric response of ceramic Sr2−xBixTi2−xFexO6 (0≤x≤1.5) perovskites

“…(a) The polar Bi-O network around the octahedral sub-lattice and the concomitant symmetry distortions, which can be enhanced when [TiO 6 ] octahedra are also present, given that Ti 4 þ cations show particularly extensive flexibility in their coordination geometry [29,30]. (b) Microstructure and compositional or chemical disorder can give rise to the stabilization of cluster-type scenarios which facilitate the polarization phenomena [15,23,31].…”

Visible Light Photocatalytic Activity of BiFeO3 Nanoparticles for Degradation of Methylene Blue

“…15 Perovskite-type of BiFeO 3 demonstrates the coexistence of multiferroic, ferroelectric and antiferromagnetic properties at room temperature with Neel temperature (TN ~367°C) and Curie temperature (TC ~830°C). 16 It has been reported that synthesis of BiFeO 3 @carbon core/shell nanofibres with different thickness of carbon layers were successful and are stable under visible light irradiation and could be easily recycled, indicating that they can be used as effective photocatalysts under visible light. 17 Hydrothermal synthesis of BiFeO 3 using KOH concentration of 4 M have been done in order to get the pure phase of bismuth ferrite to increase the photodegradation efficiency.…”

Effect of Preheating Temperature on Synthesis of Pure BiFeO3 via Sol–Gel Method

“…Considerable attention has been paid to BiFeO 3 because it considers the only material has stable multiferroic properties at room temperature [2][3][4]. Its ferroelectricity cure temperature is 830 °C and the ferromagnetic Neel's temperature is 370 °C [5][6][7]. BiFeO 3 has been utilized in many applications such as industry of radio, television, microwave and satellite communications, audio-video, digital recording and, as permanent magnets, information storage [8], transducer and magnetoelectric coupling [9,10].…”