If ferrimagnetism arises in magnetite by spontaneous magnetization due to the different layered paramagnetic iron ions of different charged, does this mean that materials with different layered paramagnetic ions will be ferrimagnetic? -
Classical and exotic magnetism: Recent advances and perspectives: Low Temperature Physics: Vol 43, No 8
Ferrimagnetism - Wikipedia
File:Ferrimagnetism - magnetic moment as a function of temperature.svg - Wikimedia Commons