Monte Carlo simulation of Fe-Co amorphous nanoparticles magnetization

B. MOLINA CONCHA; E. DE BIASI; R.D. ZYSLER

Napoles, Italia

Congreso; 6th International Symposium on Hysteresis Modelling and Micromagnetics (HMM-2007); 2007

Magnetization simulations of 3 nm non-interacting Fe–Co ferromagnetic amorphous nanoparticles were made using Metropolis algorithm of Monte Carlo method. The results of core–shell model simulations describe the nanoparticles as a ferromagnetically ordered core and a disordered surface shell. They fairly reproduce the signi.cant features observed in 3 nm Fe–Co–B nanoparticles experimental magnetization measurement at the same Fe–Co composition. They also provide a clear evidence of the role played by the local surface anisotropy and the surface–core exchange interaction in determining the magnetic properties of the nanoparticles.