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 th e effects induced by laser heating in ferromagnetic materials, during and after heat treatment. Here we report experimental results and theo retical considerations that explain the correlations between the magne toelastic wave amplitude and the magnetic permeability, the stress sen sitivity and the elastic coefficient. In particular, it is shown that structural changes can be seen, and a simple model of thermomagnetic c oupling is developed.