Year-end Sale % OFF 
Abstract
Despite considerable efforts undertaken in a rapidly developing area of multiferroic research, synthesis of phase pure BiFeO3 is still a matter of intensive research. In this work, we report the shape-controlled synthesis of pure BiFeO3 microspheres via a facile hydrothermal route. The prepared BiFeO3 powder has been characterized using powder X-ray Diffraction (XRD), Differential Thermal analysis (DTA), Scanning Electron microscopy (SEM), and impedance spectroscopy. Powder XRD analysis confirms the formation of pure rhombohedrally distorted perovskite with R3c space group. Scanning electron micrograph revealed that the prepared BiFeO3 microspheres are nearly spherical in shape with uniform size distribution. The BiFeO3 microspheres exhibit a dielectric constant value of ~110 at 1000 KHz, which is higher than the BiFeO3 prepared by conventional solid-state reaction and sol–gel method. Variation of dielectric constant with temperature at different frequencies shows that the BiFeO3 has a dielectric anomaly of ferroelectric to paraelectric type at 1093 K and this phenomenon is well supported by TGA results.
Highlights
Multiferroic ( BiFeO3) materials are being widely investigated for spintronics, data-storage, sensors and multiple-state memory applications [1] because of their dual ordering characteristics at room temperature
BiFeO3 crystallizes in a rhombohedral structure with R3c space group, and exhibits ferroelectric and antiferromagnetic properties at ~1100 and 630 K, respectively [2]
BiFeO3 has attracted significant interest owing to its high Curie temperature (1083 K) [4] and high Neel temperature (625 K) and its potential applications, such as water splitting, organic pollutants degradation (2.2 eV), solar cells and visible light optoelectronic devices [5,6,7,8]
Summary
Multiferroic ( BiFeO3) materials are being widely investigated for spintronics, data-storage, sensors and multiple-state memory applications [1] because of their dual ordering (i.e., both magnetic and polar) characteristics at room temperature. BiFeO3 finds limited application due to the high electric loss via leakage, existence of impurities, high electric coercive field, and weak magnetoelectric coupling due to the significant difference between the Curie temperature (1083 K) and the high Neel temperature (625 K), which leads to inadequate ferroelectric and magnetic properties in bulk BiFeO3. Different methods have been adopted in order to overcome the above limitations [2,3], including but not limited to different synthesis techniques, producing solid solution via rare earth ions doping at both Bi and Fe sites [2] These methods can improve the stability, multiferroic features and magnetoelectric coupling effect of BiFeO3. BiFeO3 has shown dielectric anomaly of ferroelectric to paraelectric type at 1093 K
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
