Magnetic field sensor using the asymmetric giant magnetoimpedance effect created by micromagnets

Pektas M., Kolat V. S., Bayri N., Izgi T., Atalay S.

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, cilt.32, sa.10, ss.13062-13067, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 32 Sayı: 10
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1007/s10854-021-05722-y
  • Dergi Adı: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Applied Science & Technology Source, Chemical Abstracts Core, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.13062-13067
  • İnönü Üniversitesi Adresli: Evet

Özet

A magnetic field sensor was developed using the asymmetric giant magnetoimpedance (AGMI) effect. Amorphous ferromagnetic (Fe0.06Co0.94)(72.5)Si12.5B15 wires were used in this study. The 2-cm-long wire showed an approximately 88% giant magnetoimpedance effect, and the 7-cm-long wire showed an approximately 197% giant magnetoimpedance effect. When two micromagnets were placed 1 cm from the ends of the wire, a distortion in the two peak shapes of the GMI curve was observed, and asymmetry was created by the micromagnets. The 7-cm-long wire showed an approximately 148% AGMI effect. A simple and a new approach was designed to develop a magnetic field sensor. In the design circuit, two signal generators were used to arrange the linearity and dc offset in the output signal. The circuit output showed good linearity and zero hysteresis in the +/- 250 A/m and +/- 50 A/m magnetic field regions for the 2-cm-long and 7-cm-long wires, respectively.