Two classes of magnetic materials can be identified:
hard magnetic materials with high coercive fields, such as rare-earth magnets (e.g., NdFeB);
soft magnetic materials with low coercive force, used in applications involving high-frequency alternating magnetic fields such as transformers (e.g., ferromagnetic materials like Ni, FeNi, Co, FeSi, FeSiB).
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You can easily identify them thanks to this pictogram: