Regional Symposium on Innovation in science and technology

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Magneto-impedance and Magnetic Sensitivity of FeCoSiB Nano crystalline Micro-wires under Applied Longitudinal Stress

Authors :

Ali ِDadsetan¹

1- دانشگاه فرهنگیان - پردیس نسیبه تهران

Keywords :

Magneto-impedance،sensitivity،Nano-crystalline،Micro-wires

Abstract :

The study examined the magneto-impedance (MI) and magnetic sensitivity of FeCoSiB nano-crystalline micro-wires subjected to longitudinal stress across frequencies from 0.5 to 8 MHz. Findings reveal that applying an appropriate longitudinal stress significantly enhances the MI of these micro-wires. This stress leads to a rearrangement of domain walls, affecting the circumferential anisotropy and magnetic permeability, which in turn improves the MI response. The highest MI response recorded was 189%, with a maximum magnetic sensitivity of 7.73 %/Oe at a frequency of 3 MHz when the stress reached 70 MPa. Thus, longitudinal stress emerges as an effective, low-cost, and rapid method for sensor applications, and the results can inform the design of stress sensors utilizing the giant magneto-impedance effect.

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