Off-Diagonal Magnetoimpedance in Annealed Amorphous Microwires with Positive Magnetostriction: Effect of External Stresses

It was observed recently that the giant magnetoimpedance (GMI) effect in Fe-rich glass-coated amorphous microwires with positive magnetostriction can be improved significantly by means of post-annealing. The increase GMI is attributed to induced helical magnetic anisotropy surface layer microwire, which appears after annealing. application external stresses microwire may result changes its structure and affect response. In this work, we study theoretically influence tensile torsional on off-diagonal annealed magnetostriction. static magnetization distribution analyzed terms core–shell structure. impedance tensor obtained taking into account magnetoelastic stresses. shown response exhibits strong sensitivity magnitude applied stress. results useful for sensor applications microwires.