Describe about the Ferromagnetic materials

Ferromagnetic materials are those for which k susceptibility is large and positive. These are strongly attracted by magnetic field. Illustrations are iron, cobalt, nickel etc.

A significant feature of ferromagnetic materials is that they can retain their magnetism even after magnetising field has been removed, i.e. they can become permanent magnets.

Ferromagnetic materials are those with spontaneous magnetic alignment. Ferromagnetism is property  of  a  material  to  be  strongly  attracted to  a  magnetic  field  and  to  become  a powerful magnet.