The Relaxation of Magnetic properties for Amorphous Fe - Ni - P alloys
노태환Tae Hwan Noh, 강일구Il Koo Kang
Abstract
The effect of low-temperature annealing on magnetic properties has been investigated in order to clarify the structural relaxation of a metal-metalloid type amorphous alloy, For amorphous Fe_(33)Ni_(50)P_(17) alloy, the saturation magnetization at T= OK was estimated to be almost not affected by annealing at 450k for 3hr indicating the little change of the neighbouring metalloid surroundings. The Curie temperature increased with In t_a kinetics for Fe_(33)Ni_(50)P_(17) alloy annealed at 400-450 K. From the composition dependence of the Curie temperature for amorphous (Fe_(1-x)Ni_x)_(83)P_(17) alloys (x=0-0.6), the increase in Curie temperature was interpreted to originate from the coupling between Fe and Ni atoms. The activation energy for the low-temperature relaxation causing the change in Curie temperature was about 1.3eV.