Abstract

Similar to other transition metal oxides with the same formula, ABO3 , perovskite has a cubic or nearly cubic structure. According to where the electron and energy band gaps are located, perovskite materials can be divided into three categories, with the third combining the first two. The first type has localized electrons while the second type has delocalized energy-band states, and the third type is a transition between the abovementioned two types. There are several types of perovskites, including Layered Perovskite, Perovskite ABO3 , Double Perovskite, and Triple Perovskite. The important characteristics relevant to oxide and oxide-like perovskite crystals are insulator-metal transition, ionic conduction characteristics, dielectric, superconducting, alteration of solid-state phenomenon, and metallic properties. Recently, a number of perovskite applications, including those for random access memories, actuators, tunable microwave displays, piezoelectric devices, transducers, wireless communications, sensors, and capacitors, have been investigated. Electrochromic, photochromic, and filtering devices all demonstrate perovskite's great utility in surface acoustic wave signal processing.