Computer simulation of local structure and magnetic properties of amorphous Co–B alloys

Static relaxation simulation and a systematic analysis of the local atomic structure have been performed to investigate the microstructure of amorphous Co–B alloys with pair Pak–Doyama-like potentials for all the bonds in systems. Calculations show the existence of large vacancy-like cavities in the amorphous state. The Monte Carlo method and the Ising model have been used to simulate the magnetic properties of fcc Co, amorphous Co and Co–B alloys. The temperature dependence of magnetization, local magnetization distribution and critical boron concentration for the onset of spontaneous magnetic order have been investigated and presented.