Explain the following with suitable examples:
$(iii)$ Ferrimagnetism

(N/A) $(iii)$ Ferrimagnetism: The substances in which the magnetic moments of the domains are aligned in parallel and anti-parallel directions,in unequal numbers,are said to exhibit ferrimagnetism.
Examples include $Fe_3O_4$ (magnetite),and ferrites such as $MgFe_2O_4$ and $ZnFe_2O_4$.
Ferrimagnetic substances are weakly attracted by a magnetic field as compared to ferromagnetic substances. On heating,these substances become paramagnetic.
Schematic alignment of magnetic moments in ferrimagnetic substances: (Up,Down,Down,Up,Down,Down)