demagnetization

Examples of demagnetization in the following topics:

• Adiabatic Processes

  • As an example, one can think of a multistage adiabatic magnetization-demagnetization cycle setup where a magnetic field is switched on and off in a controlled way.
  • This scheme is called adiabatic demagnetization cooling.

• Ferromagnets and Electromagnets

  • Conversely, a permanent magnet can be demagnetized by hard blows or by heating it in the absence of another magnet.

• Permanent Magnets

  • Permanent magnets are made from "hard" ferromagnetic materials such as alcino and ferrite that are subjected to special processing in a powerful magnetic field during manufacture, to align their internal microcrystalline structure, making them very hard to demagnetize.