Table of Contents

Introduction 1. Formation of a domain structure as a result of the loss of stability of the crystalline lattice in ferroelectric and ferroelastic crystals of finite dimensions. 2. Structure of domain and interphase boundaries in defect-free ferroelectrics and ferroelastics 3.Discussion of the microscopic structure of the domain boundaries in ferroelectrics 4. Interaction of domain boundaries with crystalline lattice defects 5. Structure of domain boundaries in real ferroactive materials 6. Mobility of domain boundaries in crystals with different barrier height in a lattice potential relief 7. Natural and forced dynamics of boundaries in crystals of ferroelectrics and ferroelastics References Index