Wetting and layering transitions in a nano-shell structure: Monte Carlo study.

The Monte Carlo simulations have been used to study the magnetic properties and the hysteresis of a nano-shell structure composed of four bands, comprising a ferromagnetic spins σ =±1/2 Ising model. The influence of the surface and inner magnetic fields is responsible for the wetting phenomena and the layering transitions. The behavior of the magnetizations as well as the ground state phase diagrams is presented. We also explore the effect of the external magnetic field, the temperature and the exchange coupling interactions on the hysteresis cycle. [ABSTRACT FROM AUTHOR]