Magnetization plateaus and the susceptibilities of a nano-graphene sandwich-like structure

Ising model with the anisotropy is abstracted based on a nano-graphene sandwich-like structure. The system consists of a ferromagnetic middle layer and two antiferromagnetic layers on the top and under the bottom. Multiple spin states are employed to the analysis of magnetic behavior for graphene-like molecules. The effective-field theory with correlations has been successfully applied to this, and the general formula of the magnetic properties for the nano-graphene sandwich-like structure is obtained. Results of numerical calculation for the magnetization and the susceptibilities are discussed for specific values of the external magnetic field. Magnetization plateaus appear on the magnetization curves at low temperature. The exchange coupling, the anisotropy and the external magnetic field have important roles on the magnetic properties for the nano-graphene sandwich-like structure.

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