Samples of Fe_(66)Co_(18)B_(15)Si_1, Fe_(40)Ni_(38)Mo_4B_(18) and Fe_(72.6)Cr_(22)Al_(4.8)Si_(0.3)Y_(0.3) metallic glasses were irradiated with a pulsed alexandrite laser ( lambda =750 nm, tau =60 mu s) using different laser fluences. Irradiation-induced structural and property modifications were characterized using Mossbauer spectroscopy. Complementary information was obtained from hysteresis loop measurements and scanning electron microscopy 9SEM). The experimental data obtained demonstrate the key role played by the magnetostriction constant in explaining the mechanism of irradiation-induced phase transformations in amorphous magnets.
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