Creep-induced magnetic anisotropy and magnetostriction in a nanocrystalline Co based alloy
1997
Co rich amorphous alloy (Vitrovac® 6025) ribbons have been current-annealed under a tensile stress of 500 MPa, applied along the ribbon axis. This results in a strong, creep-induced magnetic anisotropy with a hard ribbon axis, which increases as current density J increases. For high J, the magnetostriction constant showed a two component behavior as a function of measuring stress; one component for low stress (σ 100 MPa). These results are interpreted in terms of structural relaxation (low J) and nanocrystallization (high J). Magnetostriction measurements appear as a very sensitive characterization tool.
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