Investigations on structural, dielectric, and third-order nonlinear optical studies of Ni0.5Zn0.5Fe2O4 nanoparticles by microwave combustion method with different fuels (glycine, urea and citric acid).

• The synthesis of Ni 0.5 Zn 0.5 Fe 2 O 4 nanoparticles (NPs) by combustion method. • To estimate electronic polarizability using Clausius-Mossotti and Penn analysis. • The NPs exhibited multi-photon absorption and self-defocusing nature. • Industrial uses of prepared NPs should focus on optical switching. In this article, Ni 0.5 Zn 0.5 Fe 2 O 4 nanoparticles (NPs) were synthesized via microwave-assisted combustion method. XRD investigation indicates the cubic spinel structure. At ambient temperature, the dielectric constant and loss were determined by modulating the applied frequency (50 Hz to 200 kHz). The calculated third-order NLO susceptibility (χ(3)) was found for glycine (2.385 × 10-6 esu), urea (0.9696 × 10-6 esu) and citric acid (2.755 × 10-6 esu). However, this work reveals that synthesized NPs have high convenience for optoelectronic, optical switching, and limiting applications. [ABSTRACT FROM AUTHOR]