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The relationship between magnetostriction and structure of melt-spun Fe 83 Ga 17 ribbons are investigated by XRD and M¨ossbauer spectrum technique(MS).As the heat-treatment temperature increases from 650℃ to 800℃,the magnetostriction coefficient of Fe 83 Ga 17 ribbon first increases and then decreases.The largest magnetostriction coefficient(578.4 ppm) is achieved in those specimens quenched at 750℃.According to the XRD and Mo¨ssbauer spectrum analysis,a small quantity of DO 3 phase is precipitated in Fe 83 Ga 17 ribbons when quenched from 650℃ and the DO 3 phase is gradually transformed into B2-like phase if quenched at higher temperature.However,both DO 3 and B2-like phases disappear when the temperature increases up to 800℃.From this point of view,B2-like phase might be beneficial to the enhancement of magnetostrictive properties of melt-spun ribbons.
The relationship between magnetostriction and structure of melt-spun Fe 83 Ga 17 ribbons are investigated by XRD and Mossbauer spectrum technique (MS). As the heat-treatment temperature increases from 650 ° C to 800 ° C, the magnetostriction coefficient of Fe 83 Ga 17 ribbon first increases and then decreases. The largest magnetostriction coefficient (578.4 ppm) was achieved in those specimens quenched at 750 ° C.According to the XRD and Mo¨ssbauer spectrum analysis, a small quantity of DO 3 phase is precipitated in Fe 83 Ga 17 ribbons when quenched from 650 ° C. and the DO 3 phase is gradually transformed into B2-like phase if quenched at higher temperature. Both of both DO 3 and B2-like phases disappear when the temperature increases up to 800 ° C.From this point of view, B2-like phase might be beneficial to the enhancement of magnetostrictive properties of melt-spun ribbons.