<正> The specific heats of both a two-layer ferromagnetic superlattice and a two-layer ferrimagnetic one arestudied.It is found that the spin quantum numbers,th
<正> The molecular-based magnetic materials AFe~ⅡFe~Ⅲ(C_2O_4)_3have a honeycomb structure in which Fe~Ⅱ(S=2)and Fe~Ⅲ(S=5/2)occupy sites alternately.They can