Magnetic Materials and their Applications

Code 3.5.3401.9
Semester 9th
Flow H - Electronics, Circuits, Materials
Category Obligatory by selection
Credits 3
Class Hours - Lab Hours 2 - 1
Lecturers Evangelos Hristoforou, Κτενά Αφροδίτη


Introduction to magnetics: magnetostatics, diamagnetism, paramagnetism. The ferromagnetic structure: quantum response of atomic magnetic moments, short and long range interaction, energetic model of magnetic structure and material dependence. The magnetization process: magnetic domain wall movement and magnetic domain rotation, parametric dependence of magnetization, families of ferromagnetic materials. The magnetic effects: inductive effects, magnetostriction, magnetotransport effects, magnetooptic effects, other magnetic effects. Magnetic characterization technologies: magnetization loop, magnetostriction loop, magnetotransport loops, magneto-optic loops, parametric dependence of magnetic loops. Metallic magnetic alloys: classic magnetic Fe-Co-Ni metals, classic magnetic alloys, hardening of magnetic properties and permanent magnets. Magnetic oxides: spinels, ferrites, orthoferrites, garnets, magnetic semiconductors. Special categories of magnetic materials: two-dimensional magnetic materials, rapidly quenched magnetic materials, magnetic powders. Superconductivity and superconducting materials: superconducting theory, superconducting materials, superconducting effects and devices. Sensors and transducers: magnetic sensors, field sensors, other sensors. Read and write process: materials for read and write process, read and write technologies, NVRAMs. Electromechanical magnetic systems: macroscopic systems, microscopic systems, applications of electromechanical magnetic systems. New material design.

Laboratory: Magnetization loop, magnetostriction loop, magnetotransport loop. Linear variable differential transformer. Fluxgates (classic, orthogonal, rotating field). Magnetoimpedance, giant magnetoimpedance. Anisotropic magnetoresistance, giant magnetoresistance. Magnetostrictive delay lines and sensor applications. Barkhausen noise. Magnetic technology for stress tensor monitoring. Read and write information, non-volatile RAMs. Permanent magnets and superconducting materials.