### Level 1. Qualitative understanding.

Magnetic domains are areas with homogeneously distributed magnetization vector inside. The domains existence was proved by many experiments. But what is the reason for domain appearance in a sample? Domains appear to minimize the total system energy....

### Level 2. A simplified theory of stripe domain structure.

Now we know that magnetic domains appear to minimize the total system energy. Indeed, as usually any system try to reach the state in which its total energy becomes minimal one. The domain appearence minimizes the total energy of the sample by a lowering...

### Level 3. Rigorous theory of stripe DS with negligible narrow walls.

Now we analyze magnetization process in a film with the stripe domain structure (DS ) neglecting the domain wall width, see Fig.2. The total volume energy density of DS is the sum of the domain wall, Zeeman and demagnetizing energies:
(1.8)...

### Magnetic domain physics and magnetization process basics

Magnetic domains is a microareas ( with size normally about micrometers), with homogeneous magnetization (both in direction and amplitude) We consider magnetic layer, where magnetization vector is arranged only in perpendicular axes to the sample surface....

### Description changeability domain structure in magnetic fields

Interesting problem is describe magnetic material magnetization process, and define relationship magnetization M(H) depending on external magnetic fields H . For solving this problem we need knowledge about magnetic domain structure. We consider model...

### Short tutorial on magnetism of nanostructures

Now technologies allow us to create artificial materials and nanostructures which are absent in the Nature. Such nanostructures could be built on the atomic level by a precise deposition of small group atoms (atomic layers) and even isolated atoms on...

### Magnetooptical study of thin films

Magnetooptical techniques are commonly used for thin and ultrathin magnetic film study. Fig. 3.1 shows results of interaction of linearly polarized light with perpendicularly magnetized film in : (i) the transmitted mode - Faraday effect; (ii) reflected...