Unilke normal ferromagnets it is stated here that ferrite (ceramic) or else called ferrimagnets, non-intuitively have a positive temperature coefficient meaning their magnetization decreases with a drop in temperature.
Unlike Neodymium, Samarium Cobalt, and Alnico, Ceramic magnets have a Positive Temperature Coefficient for the Intrinsic Coercive Force (Hci)
Normally you would expect from magnetized matter as temperature falls, sporadic motion of atoms to be dumped down therefore an increase in coherency and alignment of the magnetic domains as temperature drops thus a stronger magnetization of the magnet and magnetic field created at lower temperatures.
What is the explanation and physical process description taking place especially in ceramic (ferrite) magnets that differs from normal ferromagnets and is responsible for this non-intuitive strange behavior?
Best Answer
We dont actually know.Finding the band structure for ceramics is not easy to do at all and is still in ongoing research so it could be anything.