Magnetic Materials

Opublikowano: 30.04.2014 23:05

Subject name Magnetic Materials
Type of subject               Specialization
Summary ECTS 1
Form of course 15h lecture
Lecturer                           Prof. Marcin Leonowicz, Ph.D., D.Sc.
A brief outline:
Lecture
  • Basic definitions and units – electricity and magnetism, magnetic field, magnetic permeability, types of magnetic interactions, magnetic hysteresis.
  • Ferromagnetism – magnetic moment of atom, exchange forces, temperature dependence of magnetisation, magnetic anisotropy, demagnetizing field, magnetostatic energy.
  • Domain structure – domain wall width, interaction of domain wall with inclusions. Interactions of magnetic field with domains. Single domain particles.
  • Magnetisation, coercive force. Soft magnetic materials – losses for hysteresis and eddy currents, types of soft magnetic materials and their applications.
  • Nancrystalline and nanocomposite materials – effect of nanostructure on the magnetic properties, effect of enhanced magnetic exchange interactions.
  • Materials for magnetic recording – magnetic discs, thin films.