Nanoscale Trilayer Ni/Cu/Fe Investigation for MI Sensor Application
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In this study, the effect of magneto-impedance (MI) in three-layer structures was studied. Ni/Cu/Fe sandwiched films were prepared by thermal evaporation on glass substrates. MI sensor impedance as a function of external magnetic field and the driving frequency was measured. MI ratios were obtained as large as 68% and 95% at 5 MHz and 15 MHz, respectively. The results showed that the three-layer structures had a dramatic increase in performance with respect to the single-layer magneto-impedance films.
KeywordsMagneto-impedance Magnetic sensor Skin effect Sandwich films
This work was done at Ferdowsi University of Mashhad in supervision of Professor M. Rezaeian Roknabadi.