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

Abstract

In the present work, the temperature dependence of the magnetostriction constant, λ_s, 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 λ_s 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 λ_s. Furthermore, after magnetic annealing, a proportionality exists between λ_s and the magnetic induced anisotropy when they are measured at room temperature. These results are interpreted in connection with the temperature dependence of λ_s.