Eur. Phys. J. Appl. Phys. 98, 47 (2023)
https://doi.org/10.1051/epjap/2023220286

Regular Article

Optical, impedance, and relaxation response of Fe³⁺ doped double perovskite solid solution

¹ Department of Physics, Faculty of Engineering & Technology, Siksha O Anusandhan Deemed to be University, Bhubaneswar 751030, India
² Department of Physics, Central Institute of Technolog Kokrajhar, (Deemed to be University, MoE, Govt of India) BTR, Assam 78337, India
³ Department of Chemistry, Siksha O Anusandhan University (Deemed to be University), Khandagiri, Bhubaneswar 75103, India

^* e-mail: rkparida65@gmail.com

Received: 12 November 2022
Received in final form: 13 February 2023
Accepted: 16 May 2023
Published online: 7 July 2023

Abstract

In this report, the effect of Fe³⁺-incorporation on the crystal structure, vibrational, optical, impedance, modulus, and ferroelectric responses of BaBi_1.8Fe_0.2TiO₆ was discussed. According to XRD and SEM studies, the crystal structure is monoclinic single-phase polycrystalline. The vibrational modes identification from the FTIR spectrum concedes different modes of symmetric and/or antisymmetric vibrations which are usual characteristics of perovskite compounds. The UV-visible study outlines strong absorption and weak reflection near UV and the visible spectrum has a cutoff wavelength of 560 nm. The Tauc and Wood relation estimated the direct band gap energy in the absorbance spectra is 2.70 eV, while the diffused reflectance spectroscopy (DRS) method revealed its value in the reflectance spectra as E_g = 2.84 eV. The resulting bandgap energies suggest that they could be used in photocatalysis. The impedance and modulus analysis supports the semiconducting nature and non-Debye kind relaxation phenomenon in the compound. The PE hysteresis loop with non-zero remanent polarization indicates the material's ferroelectric property, which is suitable for memory storage applications.