Stress dependence of the saturation magnetostriction in Co 68.15Fe 4.35Si 12.5B 15 glass-covered amorphous wires

• Published in: Journal of magnetism and magnetic materials Vol. 249; no. 1; pp. 122 - 125
• Main Authors: Chiriac, H, Neagu, Maria, Vazquez, M, Ovari, T.A, Hristoforou, E
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2002
• Subjects: Amorphous systems—soft magnetic; Amorphous systems—wires; Magnetization; Magnetoelastic effect; Magnetostriction—zero; Magnetization; Amorphous systems—soft magnetic; Amorphous systems—wires; Magnetostriction—zero; 75.50.Kj; 75.80.+q; Magnetoelastic effect
• ISSN: 0304-8853
• DOI: 10.1016/S0304-8853(02)00518-8

The influence of stress current annealing on the saturation magnetostriction for Co 68.15Fe 4.35Si 12.5B 15 glass-covered amorphous wires having 21.3 μm diameter of the metallic core and 7 μm thickness of the glass cover with and without glass cover is presented. The obtained results show that in the as-cast state the values of saturation magnetostriction at zero applied stress, λ s(0), and stress derivative, α, are about −0.11×10 −6 and −0.9×10 −10 MPa −1, respectively, for glass cover samples and −0.05×10 −6 and −1×10 −10 MPa −1, respectively, for glass removed samples. After about 3–8 min stress current annealing, λ s(0) changes from small negative to small positive values. For samples without glass cover λ s(0) max is about 1.5 times higher than for samples with glass cover.