Magnetic stability of water-quenched cobalt-based amorphous alloy

Abstract

The magnetic stability of water-quenched cobalt-based amorphous alloys has been studied experimentally. The results show that their magnetic properties decay easily at relatively low temperatures. The decay of magnetic properties is related to the rearrangement of atoms in the neighbourhood of free volume, which in turn leads to the restructuring of the local anisotropy. The data show that the magnetic stability can be improved significantly by field annealing.