Explanation
It refers to the magnetic materials that is magnetize by the external magnetic field and still maintains strong remanence after removing the external magnetic field. The residual magnetic induction intensity of this kind of materials generates a magnetic field in the surrounding space. It has high residual magnetic induction and coercive force. The commonly used permanent magnet alloy are Al Ni Co, Fe Cr Co permanent magnet alloy, permanent magnetic ferrite, rare earth and composite permanent-magnetic material.
Classification
Information materials -> Materials for electronic components -> Magnetic materials