An article to understand permanent magnet materials

Permanent magnet materials are also called "hard magnetic materials". A material that maintains a constant magnetic field once magnetized. It has wide hysteresis loop, high coercive force and high remanence. In practice, permanent magnet materials work in the second quadrant demagnetization part of the hysteresis loop after deep magnetic saturation and magnetization. Commonly used permanent magnet materials are divided into AlNiCo permanent magnet alloy, FeCrCo permanent magnet alloy, permanent magnet ferrite, rare earth permanent magnet material and composite permanent magnet material.

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