Magnet is a relatively common thing. In many modern electronic equipment and production, magnets play a huge role. I believe many people know that the magnetic force of a magnet is a physical phenomenon, but many people are not very clear about the principle. Let’s take a look at the sharing of professional magnet manufacturers today!
From a macro point of view, the substances as a whole appear to be non-magnetic. The common magnets in life are ferromagnetic substances. The common magnets in life are ferromagnetic substances. Iron is a ferromagnetic substance. You will find that there is no way to attract iron nails with an iron block. Why? Because a macroscopic substance like an iron block does not have only one magnetic domain, the magnetic moment direction of different magnetic domains is different, and the force is different. The effects cancel each other out, or show no magnetism to the outside. If you want a ferromagnetic substance to exhibit magnetism, you have to magnetize it. Put the ferromagnetic substance under a strong magnetic field, the size of the magnetic domain will change, and the magnetic domain in the same direction as the applied magnetic field will continue to expand. Finally, you will have a magnet. This process is called magnetization. So the conclusion is that the magnetic force of the magnet is produced by the spin of the electrons in the ferromagnetic substance and the movement around the nucleus.
The moving charge generates a magnetic field, so we can make an electromagnet by winding an iron core with an energized coil. But the magnets we see in daily life don't need to be wound with conductive coils. Where does its magnetic force come from? The movement of electrons around the nucleus will produce a magnetic field, and the spin of an electron will also produce a magnetic field. (Atomic nuclei also generate a magnetic field, which is too small to be ignored.) So in theory, all matter has magnetism, such as wood, such as water, but the direction of the magnetic moment generated by electrons is random (magnetic moment means magnetic The strength and direction of the vector) force and force cancel each other out.
The above is the principle of the magnet's generation of magnetic force. Whether it is in modern electronic technology production, or in some scientific research and magnetic levitation, the role of magnets is very important. I believe that after reading today's sharing, many people have a certain understanding of the magnetic force of magnets, and in the future, magnets may also play a greater role!
