1.26    Explain the following with suitable examples:

                    (iii)    Ferrimagnetism

Answers (1)

(iii)    Ferrimagnetism : 

When the magnetic moments of the domains in the substance are aligned in parallel and anti-parallel directions in unequal numbers than ferrimagnetism is observed. Refer to the given figure. They are weakly attracted by a magnetic field as compared to ferromagnetic substances. Example:Fe_3O_4 , MgFe_2O_4,ZnFe_2O_4. These substances also lose ferrimagnetism on heating and become paramagnetic.