Question

What are ferromagnetic substance? Give one example.

Answer 1

Ferromagnetic substance

• Ferromagnetic materials are substances that are strongly attracted by a magnetic field.
• The metal ions of ferromagnetic compounds are clustered together in small regions termed domains.
• Each domain serves as a little magnet. The domains in an unmagnetized portion of a ferromagnetic substance are randomly orientated, and their magnetic moments cancel.
• When a magnetic field is applied to a substance, all of the domains become oriented in the direction of the magnetic field as shown in the diagram given below, resulting in a significant magnetic effect.
• This domain ordering persists even after the magnetic field is removed and the ferromagnetic substance becomes a permanent magnet.

Examples of ferromagnetic substances

• Examples of ferromagnetic substances are cobalt$\left(\mathrm{Co}\right)$, iron$\left(\mathrm{Fe}\right)$,Nickel$\left(\mathrm{Ni}\right)$.