The magnets have two poles, but in some working occasions, a single-sided magnet is required. Therefore, it is necessary to wrap a magnet with a piece of iron, so that the side of the iron piece is magnetically shielded and refracted by the iron piece to the other side. magnet. Therefore, the magnetic force of the other side is enhanced, and such a magnet is collectively referred to as a one-sided magnet or single-sided magnet. There is no real single-sided magnet.
The material used for the single-sided magnet is generally a curved iron piece and a neodymium iron boron strong magnet, and the shape of the neodymium iron boron strong magnet used for the single-sided magnet is generally in the shape of a wafer.