Influence of stress and stress-flash annealing on the magnetic properties of amorphous Fe77.5Si7.5B15 wire

Abstract

The influence of the tensile stress on the flux reversal phenomena in as‐quenched state of Fe77.5Si7.5B15 is investigated. A large and stable Barkhausen jump is observed at a field H*, called the switching field. The switching field H* passes through a minimum as tensile stress increases and the jump in magnetization M* at H* grows with stress. It is observed that H* of the sample can be modified by flash annealing under stress. The results on magnetic properties like coercive field, squareness ratio, power loss of as‐quenched and stress‐annealed samples are presented. The stress annealing induces elastic and plastic components in anisotropy.