pysyvämagneetti

Pysyvämagneetti refers to a permanent magnet in Finnish. A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. Unlike electromagnets, permanent magnets do not require an external electric current to maintain their magnetism. The magnetic field is produced by the alignment of microscopic magnetic domains within the material. These domains are regions where the magnetic moments of atoms are aligned in the same direction.

Permanent magnets are typically made from ferromagnetic materials such as iron, nickel, cobalt, and their alloys. Rare-earth magnets, like neodymium magnets and samarium-cobalt magnets, are particularly strong types of permanent magnets. The strength and properties of a permanent magnet depend on the material composition, its manufacturing process, and its shape.

The applications of permanent magnets are widespread. They are found in electric motors, generators, loudspeakers, magnetic storage devices like hard drives, magnetic levitation systems, and many everyday items such as refrigerator magnets and latches. Their ability to produce a consistent magnetic field without continuous energy input makes them invaluable in a vast array of technological and industrial uses.