Question

What happens when Ferrimagnetic (${\mathrm{Fe}}_3{\mathrm{O}}_4$) is heated at 850K?

Answer 1

Ferrimagnetic:

1. The magnetic moment in ferrimagnetic materials are aligned in antiparallel directions similar to those in antiferromagnetic materials.
2. The number of unpaired electrons in the transition metals does not cancel out one another, resulting in a spontaneous magnetic moment instead of a zero net magnetic moment.
3. When the Ferrimagnetic materials are heated at 850K (Curie temperature) then the magnetic dipoles freely range in any direction which means the material loses its magnetic property which is happened by applying the external magnetic field.
4. Curie temperature: The temperature at which the magnetic material transforms into an acute change in its magnetic properties.