Specific heat of clustered low dimensional magneticsystems

Homometallic ferrimagnetism is quite difficult to find in Nature, and this fact makes Na₂Cu₅Si₄O₁₄ an interesting material due to its ferrimagnetic arrangement of Cu ions in a zigzag chain with dimers and trimers. In view of this, we developed a theoretical model for the magnetic specific heat of a homometallic ferrimagnet and then compared it with experimental data for Na₂Cu₅Si ₄O₁₄ compound. The successful comparison validates the model and further analysis makes it possible to predict anomalous behavior of this low dimensional magnetic system, due to the crossing of the energy levels.