Magnetic behaviors and multitransition temperatures in a nanoisland

• A nanoisland consists of a center spin-5/2 and perimeter spin-3/2 atoms.
• The general formula for the magnetization and internal energy is given.
• A new type reentrant phenomenon with multitransition temperatures is found.

A nanoisland consists of center spin-5/2 and perimeter spin-3/2 atoms, which is described by transverse Ising model with single-ion anisotropy. Magnetic behaviors of the nanoisland are studied by the effective-field theory with correlations and the differential operator technique. The formulas of the magnetization and the phase transition of the system are given. The numerical results of the phase transition, the magnetization, the initial susceptibility and the internal energy have been discussed. Some interesting phenomena, such as a new reentrant, are found. Namely there are multitransition temperatures dependent on competition among the single-ion anisotropies, the transverse field and the interlayer coupling. These results can provide some guidance to structure design in the nanoislands.

A model of nanoland is constructured and multitransition temperatures are found in the system.Figure optionsDownload as PowerPoint slide