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Fe_(62)Co_(8-x)Cr_xZr_6Nb_4B_(20)(x=0-4 at.pct)metallic glasses show high thermal stability with a maximum su- percooled liquid region of about 84.8 K.The addition of 2 at.pct Cr causes the extension of the supercooled liquid region remarkably,leading to the enhancement of thermal stability and glass-forming ability.The crys- tallization of the Fe-based glassy alloys takes place through a single exothermic reaction,accompanying the precipitation of more than three kinds of crystallized phases such asα-Fe,Fe_2Zr and ZrB_2.The long-range atomic rearrangements required for the precipitation of the multiple crystalline phases seem to play an impor- tant role in the appearance of the large supercooled liquid region through the retardation of the crystallization reactions.The Fe-based alloys exhibit soft ferromagnetic properties.The saturation magnetization decreases with increasing Cr content while the saturated magnetostriction increases as a function of Cr content.There is no distinct change in the saturation magnetization and coercive force with annealing temperature below the crystallization temperature.The devitrification gives rise to a considerable enhancement in bothσ_s and H_c.
Fe_ (62) Co_ (8-x) Cr_xZr_6Nb_4B_ (20) (x = 0-4 at.pct) metallic glasses show high thermal stability with a maximum su-percooled liquid region of about 84.8 K.The addition of 2 at.pct Cr causes the extension of the supercooled liquid region remarkably, leading to the enhancement of thermal stability and glass-forming ability. The crys-tallization of the Fe-based glassy alloys takes place through a single exothermic reaction, accompanying the precipitation of more than three kinds of crystallized phases such as α-Fe, Fe_2Zr and ZrB_2. long-range atomic rearrangements required for the precipitation of the multiple crystalline may seem to play an impor tant role in the appearance of the large supercooled liquid region through the retardation of the crystallization reactions. The Fe-based alloys exhibit soft ferromagnetic properties. The saturation magnetization decreases with increasing Cr content while the saturated magnetostriction increases as a function of Cr content. Here is no distinct ch ange in the saturation magnetization and coercive force with annealing temperature below the crystallization temperature. the devitrification gives rise to a considerable enhancement in bothσ_s and H_c.