Soft magnets, magnetic materials with low coercivity and high permeability, easy to magnetize, also easy to demagnetize, widely used in electrical equipment and electronic equipment. The most widely used are iron-silicon alloys (silicon steel sheets) and various soft magnetic ferrites. Magnets are divided into permanent magnets and soft magnets, permanent magnets are added to strong magnetism, so that the spin of magnetic substances and electron angular momentum are arranged in a fixed direction, soft magnetism is to add current (also a method of adding magnetic force) and other currents to remove the soft iron will slowly lose magnetism.
