Giant stress-impedance effect in amorphous and current annealed Fe73.5Cu1Nb3Si13.5B9 wires

Abstract The giant stress-impedance (GSI) effect in Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 wires is measured to investigate the influence of Joule heating and pulse current annealing as well as tensile stress applied during the annealing process on it. The results show that the GSI effect changes drastically with annealing techniques and the maximum stress-impedance ratio of 80% is obtained at 5.5 MHz under applied tensile stress of 20 MPa.