"Version: 202112"--Title page verso.Includes bibliographical references.1. Introduction -- 1.1. General introduction -- 1.2. Materials classification on the basis of symmetry -- 1.3. The basics of ferroelectricity and related phenomenon -- 1.4. Classification of ferroelectrics -- 1.5. Aurivillius oxides2. Odd number layered Aurivillius oxides -- 2.1. Single-layered oxides (m = 1) Bi2MoO6 and Bi…