| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7850993 | Carbon | 2015 | 29 Pages |
Abstract
A nano-graphene bilayer is described by a transverse Ising model with single-ion anisotropy. The upper layer consists of spin 3/2 with an antiferromagnetic exchange coupling, whereas the bottom layer composes of spin 5/2 with a ferromagnetic exchange coupling. Based on the effective-field theory with correlations the general formula for the magnetization is given. Magnetic properties of the system have been studied, such as the magnetization, the magnetic susceptibilities and the blocking temperature. The exchange coupling, the single-ion anisotropy, the transverse field and the external magnetic field have important effects on the blocking temperature.
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Authors
Wei Jiang, Ying-Ying Yang, An-Bang Guo,