Internal structure of a magnet
Ferromagnetic materials are made from many small elementary magnets and can be magnetized and demagnetized.
• A magnet is disassembled. The inner structure made of elementary magnets (Weiss domains) becomes clear.
• The elementary magnets in a ferromagnetic material are aligned in an external magnetic field. The material becomes magnetized, and becomes a magnet itself.
• A magnetized material is exposed to heat or mechanical force and thus loses its magnetization. It becomes demagnetized.
Information and ideas:
The students can verify the illustrated facts in simple experiments.