Irreversible relaxation studies in the amorphous Co/sub 71.5/Fe/sub 2.5/Mn/sub 2/Mo/sub 1/Si/sub 9/B/sub 14/ alloy by magnetic after-effect measurements

摘要

The first order reaction kinetics was used to describe the irreversible structure relaxation, studied by means of the magnetic after-effect (MAE) measurements in the amorphous near-zero magnetostrictive Co/sub 71.5/Fe/sub 2.5/Mn/sub 2/Mo/sub 1/Si/sub 9/B/sub 14/ alloy. The long time (t/sub 2/=2/spl divide/25000s) measurements were performed at elevated temperatures: 379/spl divide/520 K for the as-quenched and stabilized (annealed at 623 W/2h) samples. Basing on the Hesse-Rubartsch's method, the distribution range and the most probable value of the activation energy were calculated from isotherms. Three-peak activation energy spectra were obtained, which points to three different relaxation processes.