Short range order transformation and magnetostriction of Fe83Ga17 ribbons

The relationship between magnetostriction and structure of melt-spun Fe83Ga17 ribbons are investigated by XRD and Mössbauer spectrum technique (MS). As the heat-treatment temperature increases from 650°C to 800°C, the magnetostriction coefficient of Fe83Ga17 ribbon first increases and then decreases. The largest magnetostriction coefficient (−578.4 ppm) is achieved in those specimens quenched at 750°C. According to the XRD and Mössbauer spectrum analysis, a small quantity of DO3 phase is precipitated in Fe83Ga17 ribbons when quenched from 650°C and the DO3 phase is gradually transformed into B2-like phase if quenched at higher temperature. However, both DO3 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. (condensed matter: electronic structure, electrical, magnetic, and optical properties)