Title :
Irreversible relaxation studies in the amorphous Co71.5Fe2.5Mn2Mo1Si9 B14 alloy by magnetic after-effect measurements
Author :
Gawior, Wojciech W.
Author_Institution :
Inst. of Non-Ferrous Metals, Gliwice, Poland
fDate :
3/1/1994 12:00:00 AM
Abstract :
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 Co71.5Fe2.5Mn2Mo1 Si9B14 alloy. The long time (t2=2÷25000s) measurements were performed at elevated temperatures: 379÷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
Keywords :
annealing; boron alloys; cobalt alloys; ferromagnetic properties of substances; iron alloys; magnetic aftereffect; magnetic properties of amorphous substances; magnetostriction; manganese alloys; metallic glasses; molybdenum alloys; quenching (thermal); silicon alloys; 379 to 520 K; Co71.5Fe2.5Mn2Mo1Si 9B14; Hesse-Rubartsch method; activation energy spectra; amorphous magnetostrictive alloy; annealed; as-quenched; irreversible structure relaxation; magnetic after-effect; Amorphous magnetic materials; Amorphous materials; Cobalt alloys; Iron alloys; Kinetic theory; Magnetostriction; Manganese alloys; Performance evaluation; Silicon alloys; Time measurement;
Journal_Title :
Magnetics, IEEE Transactions on
