Review of Ag(Nb, Ta)O3 as a functional material

Recent research activities on functional properties and applications of Ag(Nb,Ta)O3-based materials are reviewed and critically discussed. Fundamental aspects of these materials, such as crystal chemistry, lattice dynamics and phase formation, are explained first. Further, a focus is placed on the development of state-of-the-art applications for passive components, piezoelectrics and tuneable thin films. Many areas are identified where further research should focus. This includes open questions from the fundamental segment of research as well as challenges of the applied development. The review clearly presents potentials of the Ag(Nb,Ta)O3-based materials but also reveals an incomplete understanding of these materials.