Magnets are natural magnetite. The ancient Greeks and Chinese found in nature a naturally magnetized stone called a magnet. The stone can magically pick up small pieces of iron and always point in the same direction when swung at will.
Early seafarers used the magnet as their first compass to navigate the sea. The earliest discovery and use of magnets should be Chinese, that is, the use of magnets to make the "compass", is one of the four great inventions of China.
After thousands of years of development, today the magnet has become a powerful material in our lives. By synthesizing alloys of different materials, the same effect can be achieved as magnets, but it can also increase the magnetic force. Artificial magnets existed in the 18th century, but the process of making stronger materials was slow until the 1920s, when Alnico was created
