Definition - What does Permanent Magnet mean?
Permanent Magnet is a device made from a magnetized material that creates a persistent magnetic field around an object. A good magnet produces high magnetic field and is stable against the influences which might demagnetize the material. The magnet shows some common properties such as coercivity and remanence. Another important quality of the Permanent Magnet is that it can be magnetized and retain the magnetization even after the removal of the external field. This property is known as retentivity. However, magnetizing a Permanent Magnet is very difficult.
Petropedia explains Permanent Magnet
After Permanent Magnets are magnetized, they can retain the level of the magnetism for a long period of time. These magnets are mainly classified into four categories, i.e., Neodymium Iron Boron, Alnico, Ceramic, and Samarium. Permanent Magnets have high influence on a magnetic system.
The following are some of the common uses of the Permanent Magnet:
- It is used for variant applications; one of the everyday examples is a refrigerator magnet for hanging notes on refrigerator door.
- It is used to determine magnetic moment and the direction of magnetism.
Horseshoe magnets and weld clamp magnets are some of the best commonly used examples of such magnets.