MAGNETIC-RELAXATION IN AMORPHOUS METALS

Structural and magnetic properties of ferromagnetic alloys, produced by means of spin-quenching techniques, are metastable over long periods of time. It is now well established that magnetic after effects (MAEs) in amorphous metals cannot be described by a simple exponential relaxation function. In the present investigations, MAEs have been studied on as-quenched and preannealed samples of FeB, FeNiPB, CoFeSiB and CoFeNiSiB amorphous alloys at different temperatures. In this work, analyses are presented of MAEs in these alloys being based on both continuous relaxation time distributions and stretched exponential decay functions. Special attention is paid to the discussion of the data analysis with respect to recent theoretical models.