Concept:

• Diamagnetic materials are those that acquire weak magnetism when placed in a magnetic field, which is opposite to the direction of the magnetic field. Examples - Bismuth, Copper, Zinc, Silver, Gold, Diamond, Mercury, etc.
• Paramagnetic materials are those that acquire weak magnetism when placed in the direction of the magnetic field. Examples include Aluminum, Manganese, Platinum, etc.
• Ferromagnetic materials are those that acquire strong magnetism when placed in a magnetic field, which is in the same direction as the field. Examples include Iron, Cobalt, Nickel, etc.
• Ferrimagnetic materials: This effect is observed when the magnetic moments of domains in the material are aligned in parallel and in unequal numbers in a non-parallel manner. Ferrimagnetic materials are weakly attracted by the magnetic field compared to ferromagnetic materials. Examples: NiFe₂O₄, CoFe₂O₄, Fe₃O₄ (or FeO.Fe₂O₃), CuFe₂O₄, etc.

Explanation:

• Ferromagnetic metals are strongly attracted by a magnetic force.
• Common ferromagnetic metals include Iron, Nickel, Cobalt, and alloys such as alloys.
• Ferromagnetic metals are generally used to make permanent magnets.