You can't imagine my force, powerful magnets
Is a powerful magnet can attract or repel each other, if an object inside the small molecule can be arranged according to the same direction, it becomes a magnet. Component is iron, cobalt, nickel and other special atomic structure, atomic itself has a magnetic moment, generally these mineral molecules arranged chaos. Influence each other just don't show the magnetic magnetic area, but in the external force (such as a magnetic field) guided by molecular orientation trend is consistent, just show magnetic, also known as the magnets (strong magnet). Iron, cobalt, nickel, is the most commonly used magnetic materials, permanent magnet with soft iron magnet points, basically a permanent magnet is coupled with strong magnetic, make the spin of magnetic materials and electronic angular momentum into fixed direction arrangement, soft magnetic is combined with current (is also a kind of combined with magnetic method) and other current remove soft magnetic iron will slowly lost. People didn't invent the magnet, there is a natural magnetite, the earliest discovery and use of magnet should be Chinese. So "compass" is one of the four great inventions of the Chinese!
The advantages of strong magnet: high cost performance, good mechanical properties, easy to machining; Shortcoming in low Curie temperature point, temperature characteristic is poor, and is easy to be pulverization corrosion, must through the adjust its chemical composition and take surface treatment methods to improve, so as to achieve the requirements of practical application.
Scope of application: strong magnet its widely used in hardware accessories, mold, automotive, electronics, electrical appliances, packaging, toys, gifts crafts, fitness magnetron cars, motors, micro-motor, computer, instrument, instrument, motorcycle, camera, smart phones, clocks and watches, audio, home appliances, office automation, magnets and various fields of daily life.