J. Phys. IV France 08 (1998) Pr2-179-Pr2-182
Influence of tensile stresses on the magneto impedance effect in Vitrovac 6025 ribbonsM. Tejedor1, B. Hernando1, M.L. Sánchez1, V.M. Prida1 and M. Vázquez2
1 Departamento de Física, Universidad de Oviedo, Calvo Sotelo s/n, 33007 Oviedo, Spain
2 Instituto de Magnetismo Aplicado, RENFE-UCM-CSIC, P.O. Box 155, 28230 Las Rozas, Madrid, Spain
In this work we have measured Magneto impedance (MI) effect in ribbons made of Vitrovac 6025 (Vacuumschmelze). The samples were submitted to different annealing treatments in order to change their magnetostriction constants and anisotropy fields. Tensile applied stresses up to 400 MPa were applied during measurements to study the influence of magnetoelastic anisotropy. The influence of an applied bias field up to 60 Oe was also studied. The behaviour of MI effect with tensile stresses and the applied bias field depends on the sign of magnetostriction. The sensitivities to the applied bias field obtained for these ribbons are around 20%/Oe at a frequency of 1MHz.
© EDP Sciences 1998