Abstract:
In this study, thermal treatments dependence of Magneto-impedance (MI) effect in Co72.5Si12.5B15 wires has been investigated. Wires were annealed at 460 °C for different times (1- 400 min). It was found that low time annealed leads to increase in magnetic softness. The largest change in the MI was observed at 1 MHz frequency value. It was determined that maximum MI, coercivity (Hc) and maximum field sensitivity (S) values were 247%, 1.28 A/m and 1.35% per A/m respectively in the wire annealed at 460 °C for 10 minutes. This high MI and field sensitivity value occurring in low annealed time shows that this wire can be used in the design of low magnetic field sensors.
