Purpose: In the present paper, the kinetics of crystallization process and its correlation with magnetic properties
of the Co80Si9B11 alloy was carefully examined.
Design/methodology/approach: The following experimental techniques were used: X-ray diffraction (XRD),
electrical resistivity in situ measurements (four-point probe), saturation magnetization in situ measurements
(magnetic balance) and initial relative magnetic permeability measurements (Maxwell-Wien bridge).
Findings: The investigations proved that thermal annealing of amorphous Co80Si9B11 alloy leads to a
crystallization process and radical changes of magnetic properties. The activation energy of this process was
determined as Ec=3.0±0.2 eV.
Research limitations/implications: According to the results presented in the present paper the examined alloys
can be used as a very good soft magnetic material.
Originality/value: The best soft magnetic properties are observed in as quenched state
