Generation of an external magnetic field with the spin orientation effect in a single layer Ising nanographene

• Magnetism in a single layer Ising nanogaphene (SLING) was studied by EFT.
• Spin orientation effects (SOE) on the magnetism of the SLING were studied.
• Magnetism of SLING strongly depends on the spin orientations of its magnetic atoms.
• SLING behaves as an external magnetic field generator for some spin orientations.
• We suggest that it is possible to produce an external magnetic field by using SOE.

In this work, the magnetic properties of the single layer Ising nanogaphene (SLING) are investigated by using Kaneyoshi approach (KA) within the effective field theory for different spin orientations of its magnetic atoms. We find that the magnetizations of the SLING has no phase transition, certain Curie temperature and distinct peak of susceptibility at Tc for the some spin orientations at the zero external magnetic field (H=0.0). Because these behaviors occur at H≠0.0, we suggest that the SLING generates an external magnetic field and behaves as an external magnetic field generator for these spin orientations. However, the SLING exhibits ferromagnetic behaviors for only one spin orientations. But, it exhibits antiferromagnetic behaviors for the others. For the AFM cases, diamagnetic susceptibility behaviors and type II superconductivity hysteresis behaviors are obtained. We hope that these results can open a door to obtain new class of single layer graphene and graphene-based magnetic field generator devices with the spin orientation effect.

The figure shows the external magnetic field effects on the magnetizations and the critical temperature of the SLING.Figure optionsDownload as PowerPoint slide