MAGNETOELASTIC WAVES APPLICATION TO INVESTIGATE LASER ANNEALING EFFECTS IN FERROMAGNETIC GLASS

The dependence of magnetoelastic wave amplitude on structure-sensitive parameters, in addition to the possibility of producing and detecting these waves in different parts of a sample, has been used to study the effects induced by laser heating in ferromagnetic materials, during and after heat treatment. Here we report experimental results and theoretical considerations that explain the correlations between the magnetoelastic wave amplitude and the magnetic permeability, the stress sensitivity and the elastic coefficient. In particular, it is shown that structural changes can be seen, and a simple model of thermomagnetic coupling is developed.