Ferrimagnetic is converted into paramagnetic at (in K) :
500
400
700
850
Ferrimagnetism:
In ferrimagnetic substances, there is an unequal number of parallel and antiparallel magnetic momenta which leads to some resulting magnetic moment.
For example, Fe3O4, Ferrites
Effect of Temperature:
The ferromagnetic, anti-ferromagnetic and ferrimagnetic solids change into paramagnetic at a particular temperature. For example, Ferrimagnetic Fe3O4 on heating to 850 K becomes paramagnetic this is due to the alignment of spins in one direction on heating.
Ferrimagnetic is converted into paramagnetic at 850 K because at high-temperature randomisation of spin changes.