Density, elastic and magnetic properties of Co–Fe–Ta–Si metallic glasses by theory and experiment

Ab initio molecular dynamics simulations were employed to study the density, elastic and magnetic properties of Co–Fe–Ta–Si metallic glass thin films. A density of 8.03 g cm−3, a Young’s modulus of 187 GPa and a volume magnetization of 0.089 μB Å−3 were calculated and validated by thin film experiments. The extensive stiffness of this glass may be related to the existence of strong (Fe,Co)–Si clusters as revealed by ab initio chemical short-range order data.