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Abstract In this communication, studies of basic crystal structure, microstructure, dielectrics, impedance, conductivity, electric polarization and magnetization of an eco-friendly distorted perovskite Bi(Co 0.35 Ti 0.35 Fe 0.30)O 3 (abbreviate as BCTF70/30) have been reported. Analysis of crystal structure, phase formation and composition of the specimen, carried out through the powder X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDXS) techniques, confirms the formation of single-phase orthorhombic system at room temperature. The surface morphology of the compound, evaluated through the field emission scanning electron microscope, displayed the formation of high-density sample with uniform distributions of grains of varying dimensions. The phonon mode, intensity, location and width of the Raman peaks were analyzed using the Raman spectroscopy. The correlation between the frequency-temperature dielectric parameters, impedance parameters and electrical conductivity with structure-microstructure has been established. The influence of grain and grain boundary on the resistive and capacitive features has been examined through impedance spectroscopy formalism with an idealized simulated circuit. Studies of impedance spectroscopic show the semiconductor nature (i.e., negative temperature coefficient of resistance) and the non-Debye type relaxation. Polarization versus electric field analysis of BCTF70/30 sample displays enhanced value of remnant polarization as compared to that of BFO. The magnetic hysteresis loop analysis also exhibits significant improvement in the magnetization values of the compound. Accordingly, based on such enhancement of remnant polarization and magnetic parameters, we assumed that an eco-friendly material of BCTF70/30 could considered as promising material for some new electronic devices. [ABSTRACT FROM AUTHOR]

Low electric and magnetic moment features are the main drawbacks that restrict the practical utilities of bismuth ferrite. Successfully, we have substituted Li+ and W6+ in Sb3+ and Fe3+ sites to eliminate further confinements of bismuth ferrite (referred as BFO/BiFeO 3). A new lead-free perovskite compound of (SbLi) 1/2 (Fe 2/3 W 1/3)O 3 (symbolized as SLFWO) has been produced through ceramic processing (high temperature) route. The calcination temperature of said compound is confirmed from the thermogravimetric analysis. The structural, microstructural, magnetic and electrical (dielectric constant/loss, impedance, modulus, conductivity) features of the said material have been studied over an extensive range of frequency (100 Hz-1 MHz) and temperature (RT-400 °C). The finding of reflection indices and crystal parameters approve the development of polycrystalline nature with orthorhombic symmetry of the compound. The impedance analysis confirms the existence of non-Debye type relaxation trend. The frequency-temperature dependence of ac-conductivity studies proves the nature and conduction mechanism in the compound. At specific peak frequency, the modulus spectrum movements of the charge carrier vary from wide array to narrow array. The peak frequencies increase with temperature signifying the thermally activated relaxation process. The value of leakage current rises with the temperature that established the NTCR trend of the compound. The observed values of remanent magnetization, saturation magnetization and coercivity of SLFWO are 0.5647 emu/g, 0.04953 emu/g, and 104.242 Oe respectively. • The material is quite new considering its application point of view. • The structural, thermal, impedance and magnetic properties with in-depth understanding are explained well in this manuscript. • The material has an excellent electrical and magnetic property. [ABSTRACT FROM AUTHOR]