Process for producing alloy, alloy and alloy containing sheets made therefrom

摘要

A powdery alloy mainly composed of Mn-Bi having particle diameter of 5 mu m or less which has a magnetic anisotropy of 6000 Oe or more in coercive force and 35 emu/g or more in saturation magnetization, wherein the size of crystallite according to Scheler's formula is 700 ANGSTROM or less; and an alloy containing sheet of 0.5 to 10 mu m thickness in which a powdery alloy mainly composed of Mn-Bi having particle diameter of 5 mu m or less which has a magnetic anisotropy of 6000 Oe or more in coercive force and 35 emu/g or more in saturation magnetization is bound with a binder into a sheet of 0.5 to 10 mu m thickness in a state magnetically oriented toward said direction of magnetic anisotropy, wherein when said sheet is measured toward said magnetic anisotropy direction at 16 kOe and 5 kOe, the ratio of residual magnetic flux density Mr16k and Mr5k (Mr5k/Mr16k) is 0.85 or more.