Monte Carlo study of magnetic behavior of core–shell nanoribbon

Abstract

Abstract Using Monte Carlo simulations within Ising model, we study the magnetic properties and the hysteresis loops of a core–shell nanoribbon, made of spins σ = 1 2 core surrounded by spins S =1 shell with anti-ferromagnetic intermediate coupling. We analyze the ground-state phase diagrams in the presence of external magnetic and crystal fields. We show the existence of the compensation temperature and its dependence on the σ – S and S – S couplings. We investigate the effects of the crystal-field, temperature, shell interactions and intermediate coupling on the hysteresis curves. A number of characteristic behaviors are found, such as the occurrence of single and triple hysteresis loops for appropriate values of the system parameters. The obtained results are in good agreement with available experimental and theoretical works.