Question -
Answer -
Ferromagnetic substances would make betterpermanent magnets.
In solid state, the metal ions of ferromagneticsubstances are grouped together into small regions. These regions are calleddomains and each domain acts as a tiny magnet. In an unmagnetised piece of aferromagnetic substance, the domains are randomly oriented. As a result, themagnetic moments of the domains get cancelled. However, when the substance isplaced in a magnetic field, all the domains get oriented in the direction ofthe magnetic field and a strong magnetic effect is produced.
The ordering of the domainspersists even after the removal of the magnetic field. Thus, the ferromagneticsubstance becomes a permanent magnet.