Magnetic Anisotropy in an Amorphous Fe80P13C7Alloy

This is the authors' abstract. We don't add key points for this paper.

The temperature dependence of the uniaxial magnetic anisotropy K u was examined using a high sensitivity torque magnetometer. K u exists even after the rough surface and striations in the ribbon of rapidly quenched amorphous alloy, Fe 80 P 13 C 7 , were removed. The values of K u are 0.7 to 1.4×10 4 erg/cm 3 at room temperature and they decrease until about the Curie point (340°C) is reached with a slight kink at about 210°C. The magnetic anisotropies of sucked alloys, Fe 100- x P x (16.3≦ x ≦26.6) and Fe 100- x C x (3.8≦ x ≦18.2), which are the constitutional alloys of the crystallized alloy, Fe 80 P 13 C 7 , were also studied. The uniaxial magnetic anisotropy in the amorphous Fe 80 P 13 C 7 alloy cannot be explained either by uniaxial stress or directional pair ordering. The magnetic anisotropy can be explained by the fine crystallites of Fe 3 P and Fe 3 C alloys in the amorphous matrix of an Fe 80 P 13 C 7 alloy.