Abstract
The enhancement of longitudinally driven giant magnetoimpedance (LDGMI) effect in FeCuNbSiB ribbons was investigated utilizing magnetoelastic resonance. A maximum LDGMI ratio of the order of 10,000% was obtained for the ribbon annealed at 480 °C under optimum driving current frequency and driving current intensity. The dependences of enhancement magnitude on magnetoelastic coupling coefficient k33 and quality factor Q were analyzed in detail. It was found that high k33 and Q were favorable to enhance giant magnetoimpedance effect. The complex permeability of ribbon core was calculated, and the relationship between them and LDGMI enhancement behavior was also discussed. Additionally, a simple magnetic sensor based on this effect was developed. Its output sensitivity and stability were studied as well.
| Original language | English |
|---|---|
| Pages (from-to) | 62-65 |
| Number of pages | 4 |
| Journal | Sensors and Actuators A: Physical |
| Volume | 161 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - Jun 2010 |
Keywords
- High sensitivity
- Longitudinally driven giant magnetoimpedance
- Magnetic sensors
- Magnetoelastic resonance