Abstract
The magnetic after effect has been considered as an effective tool for the investigation of structural defects in crystalline materials. However, the increasing use of the amorphous ferromagnetic materials, because of their wide range of possible applications, created interest in the study of these materials and the same technique is now being applied for amorphous materials. In the present work, measurements of the magnetic properties have been made made on amorphous material with composition Fe40 Ni40 B20 using a differential AC method . Measurements have been made from 4.2 to 750 K. The material for the specimens was produced by melt-spinning technique and was in the form of ribbon, 2mm wide and 25µm thick. The whole experimental run was controlled by a BBC micro-computer. The results obtained are discussed and compared with the previous work.
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