Question

For a ferrimagnetic material:

• A. Magnetic moments of the domains are aligned in parallel and anti-parallel directions in unequal numbers
• B. Magnetic moments of the domains are aligned in parallel and anti-parallel directions in equal numbers
• C. On heating, substance loses its ferrimagnetism property
• D. Both (a) and (c)

Answer 1

The correct option is D Both (a) and (c)

Ferrimagnetism arises due to the unequal magnetic moments in opposite direction, resulting net magnetic moment in one direction.

Magnetic moments of the domains are aligned in parallel and anti-parallel directions in unequal numbers
These materials are weakly attracted by magnetic fields as compared to ferromagnetic substances.

On heating, substance loses its ferrimagnetism property and becomes paramagnetic.

$F{e}_3{O}_4,\text{ferrites like}MgF{e}_2{O}_4\text{and}ZnF{e}_2{O}_4$ are examples of ferrimagnetism.