Antiferro magnetic material
Antiferromagnetic materials are materials where the magnetic moments of neighboring atoms align in an antiparallel fashion, resulting in no net magnetic.Here are some examples of antiferromagnetic materials: Manganese oxide (MnO), Chromium, Hematite, Iron manganese (FeMn), and Nickel oxide (NiO). Antiferromagnetic materials have several properties, including: Temperature dependence The magnetic susceptibility of antiferromagnetic materials increases with temperature below the Néel temperature, but decreases above it. Coupling with ferromagnets Antiferromagnetic materials can couple with ferromagnetic materials through a process called exchange bias. This allows the orientation of the ferromagnetic film to be “pinned”, which is used in magnetic sensors like hard disk drive read heads. Antiferromagnetic materials are different from ferromagnetic and paramagnetic materials, which have the following magnetic behaviors:
Ferromagnetic: Unpaired electrons are all aligned.
Paramagnetic: Unpaired electrons are randomly arranged.
