Dielectric properties of materials for electrical insulators and capacitors. Piezo electric and ferro electric materials, Electrostriction. Electronic structure of magnetic materials. Localized and Itinerant (band) models - Direct. Super and Indirect (RKKY) exchange interactions. Molecular field theories. magnetic domains - Influence of defects in, shape and size of samples on the magnetization process. Soft and hard magnetic materials, Magnetic anisotropy, Magnetostriction, Ferromagnetic semiconductors, Ferrites. Gamets and their applications. Rare earths. transition metals and intermetallic compounds - Kondo effect and valence instabilities. Absorption and emission of radiation in ionic crystals. Materials for optical! windows. phosphors for radiation detection and dosimeters. Electron luminescent materials. Absorption and emission of radiation in semiconductors. Materials for infrared detection, light emitting diodes. Photocells and image intensifiers. Nonlinear optical materials.