Reactive diffusion in amorphous Fe-B and Co-Zr multilayer films

The diffusion in $\text{Fe}{}_{\mathrm{1-x}}\text{B}{}_{\mathrm{x}}\text{Fe}{}_{\mathrm{1-y}}\text{B}{}_{\mathrm{y}}$ and $\text{Co}{}_{\mathrm{1-x}}\text{Zr}{}_{\mathrm{x}}\text{Co}{}_{\mathrm{1-y}}\text{Zr}{}_{\mathrm{y}}$ amorphous bi- and multilayers was investigated. The dependence of the diffusion coefficient on concentration was observed. This effect was explained taking into account the concentration dependence of mixing enthalpy correlated with chemical short range order in amorphous state.