Temperature dependence of the magnetostriction constant of nearly zero magnetostriction amorphous alloys

Abstract

In the present work, the temperature dependence of the magnetostriction constant, λs, is presented for two Co-rich amorphous alloys which have a very low magnetostriction (about 10−7). These measurements have been carried out with the help of a new sensitive method and a change of sign of λs has been found experimentally at temperatures below the Curie point. We have interpreted it by taking into account the different temperature dependence of single-ion and two-ion constributions to λs. Furthermore, after magnetic annealing, a proportionality exists between λs and the magnetic induced anisotropy when they are measured at room temperature. These results are interpreted in connection with the temperature dependence of λs.