This book touches upon theoretical and experimental studies of superconductive materials and their applications. The chapters have been prepared by internationally recognised teams from Russia, Austria, Italy and Taiwan in the field of theoretical, model and experimental methods and investigations of different ferroelectric and superconductive materials, composites and novel devices designed on their base. The book also addresses students, post-graduate students, scientists and engineers, taking part in the development and research of erroelectric, superconductive and related materials.