Abstract
The developing of electromagnetic has established the concept and the law about solid magnetic in the 19th century. In the mid-19th century, outputting of the first theory on the magnetic media bases on the concept of molecular electric current. The latter half of the 19th century, Magnetic materials have been in the use of electrical, the experimental methods of study the phenomenon of ferromagnetic magnetization have developed.
Determine some of the basic elements of the law of ferromagnetic magnetization. And put forward the preliminary hypothesis of leading to ferromagnetic interaction between the internal (molecular fields) and well-known Curie law of paramagnetic magnetization. In the first decade of the 20th century, systems theory of paramagnetic (Langevin theory) and ferromagnetism (Weiss theory) has developed.
There is a strong "exchange coupling" role between adjacent electronic in the ferromagnetic material. Spin magnetic moment "spontaneous" line up neatly in a small region, and form spontaneous magnetization in small region, known as the magnetic domain. This article from the following aspects of the technology magnetization of magnetic domain analysis:
Spontaneous magnetization of ferromagnetic material, there are Weiss molecular field model, Heisenberg exchange model and various theoretical models. Energy band model of spontaneous magnetization solves the magnetism of metallic magnetic materials and atomic magnetic moment of the non-integer.
Study the mechanism of technology magnetization and magnetization process, through studying formation of magnetic domain and technology magnetization.
The ferrimagnetism of ferrite is like its ferromagnetism, Ferrite have the feature of technology magnetization.
Keywords： Magnetic domain; Technical magnetization; Energy band model; Ferrimagnetism
