Magnetostriction of Fe100−xBx glasses

Abstract

Magnetostriction λ_s has been measured at room temperature and 80 K in Fe_100−xB_x (14?x?23 at.%) glasses using metal foil strain gauges. Several compositions were also studied as a function of temperature from 80 K to T ? T_C. The single‐ion uniaxial temperature dependence confirmed previously for Fe₈₀B₂₀ glass is also observed here for x=20 and 22. At lower boron concentrations departures from this expected temperature dependence are observed. The values of λ_s(295K) show a broad maximum of about 35×10⁻⁶ at x?20 at.%B. Crystallization of the glasses gives rise to a nonmonotonic temperature dependence of λ_s.