Giant dielectric response, nonlinear characteristics, and humidity sensing properties of a novel perovskite: NaSrTbCuTiO.

In this study, we unveil a novel perovskite compound, NaSrTbCuTiO, synthesized through a solid-state reaction method, exhibiting remarkable giant dielectric response, nonlinear characteristics, and humidity sensing capabilities. This research highlights the emergence of a Cu-rich phase, the properties of which undergo significant alterations depending on the sintering conditions. The optimization of sintering parameters, encompassing a temperature range of 1040-1450 °C for 1-8 h, resulted in substantial dielectric permittivity (') values (∼2800-6000).