Synthesis and Characterization of Co-doped (Li/W) Distorted Perovskite Bismuth Manganite (Bi1/2Li1/2)(Mn1/2W1/2)O3 for Electronic Devices

Abstract

In this paper, structural, surface, capacitive, and transport characteristics of newly designed co-doped (Li⁺/W⁶⁺) distorted perovskite bismuth manganite of a composition (Bi_1/2Li_1/2)(Mn_1/2W_1/2)O₃ have been reported. The structural analysis of the material using X-ray diffraction data determines distorted perovskite monoclinic structure with unit cell dimensions of a = 8.4642 Å, b = 12.5179 Å, c = 8.2215 Å, V = 869.04 ų, and β = 93.96°. Analysis of vibrational molecular bands of Raman and Fourier transform infrared spectroscopy (FTIR) spectra shows the inclusion/doping of Li⁺/W⁶⁺ ions in the parent compound (bismuth manganite). A detailed study of impedance spectroscopy data shows the existence of a non-Debye relaxation mechanism indicating negative temperature coefficient of resistance (NTCR) behavior in the compound. Conductivity analysis shed light on the existence of charge transport mechanism and correlated barrier hopping process in the material. The hysteresis loops suggest the existence of ferroelectric properties in the material. In conclusion, this synthesized material shows excellent potential (TCR =  − 1.3%/°C) for temperature-based applications.