Magnetism and Magnetic Materials


Code 712
Semester Spring
Class Hours - Lab Hours 2 - 1
Lecturers Evangelos Hristoforou
Links MyCourses

Description

Introduction to Magnetism (magnetostatics, paramagnetism, diamagnetism)
Ferromagnetic order (quantum magnetic moments, short and long range interaction, energetic model of magnetic structure and material dependence)
Magnetization process (magnetic domain wall movement and magnetic domain rotation, parametric dependence of magnetization, categories of ferromagnetic materials)
Magnetic phenomena (inductive effects, magnetostriction, magnetotransport effects, magneto-optic effects, other magnetic effects)
Magnetic characterization techniques (magnetization loop, magnetostriction loop, magnetoimpedance loop, magneto-optic response, parametric dependence of magentizatic loops)
Metallic magnetic alloys (classic materials (Fe, Co, Ni), alloys of classic ferromagnetic metals, magnetic properties hardening, permanent magnets)
Magnetic oxides (spinnels, ferrites, orthoferrites, garnets, magnetic semiconductors)
Special categories of magnetic materials (two-dimensional magnetic materials, rapidly quenched magnetic materials, magnetic powders)
Superconductivity and superconducting materials (basic theory of super-conductivity, superconducting materials, superconducting effects and devices)
Sensors and transducers (mechanical sensors, magnetometers, other sensors)
Read and Write of Information (materials for information writing, read & write techniques, MNVRAMs)
Electromechanical magnetic systems (macroscopic systems, microscopic systems, applications of electromechanical magnetic systems)
Laboratory exercises: Magnetization loop, magnetostriction loop, magnetoresistance loop, linear variable differential transformer, fluxgates (classic & orthogonal fluxgates, rotating fluxgates), Magnetoimpedance, giant magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance, magnetostrictive delay lines, applications in sensors, Barkhausen noise, magnetic technique to monitor the stress tensor in magnetic steels, read and write information, non-volatile memories, permanent magnets and superconducting materials.