Optical properties of ZnMn1.5Al0.5O4 spinel nanoparticles: direct band gap, low Urbach energy, and estimated nonlinear optical response
In this work, the single-phase spinel oxide ZnMn1.5Al0.5O4(ZMAO) was successfully synthesized via the sol–gel auto-combustion method. X-ray diffraction analysis confirmed that the sample crystallizes in a tetragonal spinel structure with the I41/amd space group. The optical properties, based on UV-visible-NIR reflectan...