Effect of tensile stresses on the Δ E effect in ferromagnetic Fe64Co21B15 ribbons

Effect of elastic tensile stresses on the Δ E -effect magnitude in ferromagnetic Fe₆₄Co₂₁B₁₅ amorphous ribbons subjected to magnetic annealing and dc treatment was studied. In the case of relatively low tensile stresses, the maximum magnitude of the negative Δ E effect in the ribbons under study is shown to increase whatever their treatment. The subsequent increase in elastic tensile stresses leads to a decrease in the maximum value of the negative ΔE effect. The maximum sensitivity of the ΔE effect to the applied elastic tensile stresses is characteristic of samples subjected to magnetic annealing. The results obtained are explained using a conception of the effect of magnetic domain structure and mechanisms of its transformation induced by magnetic field and elastic tensile stresses on the ΔE effect in amorphous ferromagnetic ribbons.