Permanent magnets are everyday magnets that many people know very well. A typical example of a permanent magnet that is used every day is a fridge magnet. In addition to permanent magnets, there are two other types like temporary magnets and electromagnets. Permanent magnets are called that because once they become magnetized after the first time, then they will continue to retain that level of magnetism.
In addition, permanent magnets can be made in almost any shape. A reliable magnet should have a high magnetism with a low mass. In addition, when you look for characteristics of a good permanent magnet, you will want to make sure that it remains dependable against the many elements out there that can demagnetize it. There are a range of magnet types and each one has various characteristics and the distinguishing factors include the ease with which the magnets can be demagnetized, the strength of the magnet, and the variance of the magnet's strength based on the temperature.
There are several kinds of permanent magnets you will find: neodymium, ceramic, alnico, and samarium-cobalt. Samarium-cobalt and neodymium are known as rare earth elements that create the biggest magnetic flux with the least amount of mass. These are recognized as the most powerful of all the permanent magnets and are hard to demagnetize. Alnico's name is taken from elements that it is made of, which is nickel, cobalt, and aluminum. This type is not influenced by temperature easily but it can be demagnetized easily. Finally, ferrite or ceramic magnets are probably the most well-known type because they are usually thin and flexible. These magnets can be bent and shaped in a range of different ways, which makes them superior choices for the purpose of marketing and advertising.
Modern theories of magnets state that a magnetic field is made by a moving electric charge. The magnetic field of a permanent magnet like a lodestone is caused when electrons within iron atoms spin uniformly in a similar direction. The functions of permanent magnets vary sharply. Mechanical applications depend on the pulling and pushing strength of the magnet. These applications consist of bearing devices, torque drives, holding devices, and magnetic separators. Electrical energy applications depend on the use of the magnetic field that transforms mechanical energy into the electric type. These applications include alternators, generators, and eddy brakes. Applications for mechanical energy depend on magnetism to transform electrical energy into the mechanical type. These applications are made for motors, speakers, meters, and relays. Applications are created to direct and manipulate ion and electron beams for cyclotrons, cathode-ray tubes, and ion pumps.
Permanent magnets are the most widely known magnets that are made for many uses and environments. When you select one, you will want one based on how strong they are, how well they perform based on temperature, and how easily they can be demagnetized.
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