Sensitivity enhancement of longitudinally driven giant magnetoimpedance magnetic sensor using magnetoelastic resonance

Z. M. Wu, K. Huang, S. P. Li, J. Y. Kang, Z. J. Zhao, X. L. Yang

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

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 languageEnglish
Pages (from-to)62-65
Number of pages4
JournalSensors and Actuators A: Physical
Volume161
Issue number1-2
DOIs
StatePublished - Jun 2010

Keywords

  • High sensitivity
  • Longitudinally driven giant magnetoimpedance
  • Magnetic sensors
  • Magnetoelastic resonance

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