MAGNETOELASTICITY AND THE EFFECT OF INTERNAL-STRESSES IN AGNI MULTILAYERS

We evidenced substantial modulus and damping effects of magnetomechani cal origin in a series of AgNi multilayer films, with use of a vibrati ng composite reed system. From detailed analysis, it is concluded that they are primarily linked to the reversible motion of the domain wall s. Measurements performed after various thermal treatments revealed dr astic changes in the magnitude of the magnetoelastic effects studied. It is shown that these modifications mostly originate in the developme nt or relief of biaxial stresses generated thermoelastically or result ing from a microstructural evolution of these layered structures on an nealing.