Piezomagnetic properties of a stress-annealed amorphous Fe-Nb-Si-B alloy

Creep induced magnetic anisotropy in correlation with /spl Delta/E effect was investigated in the ribbons of the Fe/sub 74.7/Nb/sub 3/Si/sub 12.8/B/sub 9.5/ amorphous alloy upon annealing treatment. It was found that hard-ribbon-axis anisotropy developed in the alloy due to the annealing under tensile stress of 207 MPa in the temperature interval 543 K-633 K. The maximum values of the magnetoelastic coupling coefficient 0.35 and 0.29 were obtained at the annealing temperatures 543 K and 633 K, repetitively. Model calculations suggested that the domain structure and piezomagnetic properties are strongly influenced by the internal stress level.