Strong magnets talk about what kinds of magnetic

The magnetic properties of transition group metals (such as iron) and their alloys and compounds are called ferromagnetism, a name derived from the fact that iron is the most common and most typical of ferromagnetic substances. Samarium, neodymium and cobalt alloys are often used to make strong magnets.

In the absence of an applied magnetic field, the magnetic domains are subject to exchange of electrons between neighboring atoms or other interactions. So that their magnetic moments, after overcoming the effects of thermal motion, the strong magnets are in a partially canceled ordered arrangement such that there is also a combined magnetic moment [1]. When an external magnetic field is applied, the variation of the magnetization intensity with the external magnetic field is similar to that of ferromagnets. Subferromagnetism has the same physical nature as antiferromagnetism, except that the size of the antiparallel spin magnetic moments in subferromagnets is unequal, and thus there is a partially canceled inexhaustible spontaneous magnetic moment, similar to that of ferromagnets. Ferrites are mostly subferromagnetic magnets.

Antimagnetism is a number of substances in which the electron magnetic moments in the atoms cancel each other and the combined magnetic moment is zero. However, magnets are those in which the electron orbital motion changes when subjected to an applied magnetic field, and a small combined magnetic moment is generated in the opposite direction to the applied field. Strong magnets so that the magnetization of the material magnetism becomes a very small negative number (amount). The magnetization rate is the ratio of the combined magnetic moment (called magnetization strength) to the magnetic field strength of a substance under the action of an applied magnetic field, symbolized as κ. The magnetization rate of a generally antimagnetic (sexual) substance is about negative one millionth (-10-6).

Paramagnetic substances have a positive magnetization rate, which is 1 to 3 orders of magnitude greater than that of antimagnetism, X about 10-5 to 10-3, obeying Curie's law or Curie-Weiss law. When an ion, atom or molecule with unpaired electrons in a strong magnet substance, there is spin angular momentum and orbital angular momentum of electrons, and there is spin magnetic moment and orbital magnetic moment. Under the action of an external magnetic field, the magnetic moment, which has a disordered orientation, will be oriented and thus exhibit paramagnetism.