Dr. Andrei L. Kholkin is a Principal Researcher at the CICECO-Aveiro Institute of Materials and Department of Physics at the University of Aveiro in Portugal. Dr. Kholkin’s research interests are in the area of materials science of ferroelectrics, piezoelectrics, and multiferroics: thin films, single crystals and ceramics. His study is mainly devoted to functional materials for piezoelectric devices, degradation effects, and, recently, to their nanoscale characterization by Scanning Probe Microscopy techniques. Prof. Oleg Pakhomov was an Associate Professor of Cryogenics and Cryoelectronics at ITMO University in St. Petersburg, Russia. Dr. Pakhomov’s primary research interests included the study of materials with ferroelectric, piezoelectric and electrocaloric properties. He passed away in October, 2021. Prof. Alexander A. Semenov is the Head of the Department of Physical Electronics and Technology at St. Petersburg Electrotechnical University in Russia. Dr. Semenov current research activities include the physics of wave processes in layered structures and applications of ferroelectric, ferromagnetic films and layered nanostructures in microwave electronics. Dr. Alexander Tselev is a Principal Researcher at the CICECO-Aveiro Institute of Materials and Department of Physics at the University of Aveiro in Portugal. Dr. Tselev’s primary research interests include the physics of novel functional materials for energy storage and harvesting as well as for electronics, photonics, and data storage with a focus on complex oxide materials.