Crystallization kinetics of an amorphous magnet

Publisher Website
Google Scholar
Abstract
The crystallization of an amorphous Fe-Ni-P alloy during isothermal annealing has been studied using a method that relies on the magnetism of the crystalline product. By rescaling the time axis for each annealing temperature, the data fall on a universal curve of the Johnson–Mehl–Avrami form, with parameters indicative of linear growth of a fixed number of crystallites. The time scaling parameter can be fitted to a Vogel–Fulcher or a Williams–Landel–Ferry temperature dependence, suggesting that dynamic processes in the glass phase are the rate-limiting steps in crystallization.