The relationship between the weak version of this phenomenon and heavy fermion superconductivity is a topic of much current research. Occurring mostly in transition metal and rare earth oxides, it is found below 120 Kelvin in manganese oxide and 280 
The relationship between the weak version of this phenomenon and heavy fermion superconductivity is a topic of much current research. Occurring mostly in transition metal and rare earth oxides, it is found below 120 Kelvin in manganese oxide and 280 Kelvin in dichromium trioxide, but has been observed at over 600K in some lanthanum compounds.  Unlike in ferrimagnetism, the cancellation of atomic moments is complete, so there is no net moment. Materials that can exhibit this behavior do so only below the Neel point; above that point, show paramagnetism. FTP, name the behavior resulting when neighboring magnetic moments in a material are in an antiparallel alignment; the opposite of a more familiar form of magnetism.
The relationship between the weak version of this phenomenon and heavy fermion superconductivity is a topic of much current research.
antiferromagnetism