What's the advantage of wearing a magnet?
First of all, the magnet is a ferromagnetic substance. If you want it to be magnetic, you must magnetize it and let the magnetism disappear. Magnetization is the process by which a magnetic substance is not magnetic. The principle of magnetic material is divided into many small areas, each tiny area is called a magnetic domain, each magnetic domain has its own magnetic distance (that is, a small magnetic field). Generally, the magnetic distances of each domain are different, and the magnetic fields cancel each other, so the whole material is not magnetic. When the direction of each domain is uniform, the whole material shows magnetism.
Demagnetization: when the magnetized material is affected by the external energy, such as heating and impact, the magnetic distance of each domain will become inconsistent, and the magnetism will weaken or disappear. This process is called demagnetization. Magnetism, usually referred to as ferromagnetism, is the magnetism of a magnet. In addition to metal, iron also includes metals, nickel, cobalt, some rare earth metals, and certain oxides and compounds of these metals. The physical and magnetic paramagnetic, anti magnetic, anti ferromagnetic, paramagnetic and diamagnetic materials in nature are, so the magnet becomes very strange.
So the whole material doesn't show magnetism. When the direction of each domain is uniform, the whole material shows magnetism. The so-called magnetization is to make the magnetic domain of the magnetic domain in the magnetic material become consistent. When the material that does not exhibit magnetism is placed into another strong magnetic field, it is magnetized, but not all materials can be magnetized, and only a few metals and metal compounds can be magnetized.
