püsimagnetitega

Püsimagnetitega refers to permanent magnets in Estonian. A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. This magnetic field is responsible for the attractive or repulsive force exerted by the magnet on other magnetic materials. Permanent magnets are distinct from electromagnets, which require an electric current to produce a magnetic field.

The magnetic properties of permanent magnets arise from the alignment of electron spins within the material. In ferromagnetic materials, such as iron, nickel, and cobalt, and their alloys, these electron spins can be aligned by an external magnetic field. Once the external field is removed, a significant portion of this alignment can remain, resulting in a permanent magnetic field. The strength and permanence of the magnetism depend on the material's composition and how it is manufactured.

Common applications of permanent magnets are widespread and include household items like refrigerator magnets and speakers. They are also crucial components in electric motors, generators, magnetic storage devices such as hard drives, and medical imaging technologies like MRI scanners. The development of high-strength permanent magnets has significantly advanced many technologies, enabling smaller, more efficient, and more powerful devices. The study and application of permanent magnets fall under the broader field of magnetism within physics.