Enhancement of giant magneto-impedance effect in Ni80Fe20/SiO2/Cu composite wires |
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| Authors: | Lingyan Shi Juan Zhang HB Gao |
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| Institution: | a Department of Physics, Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, East China Normal University, Shanghai 200062, China
a Institute of Experimental Physics, University of Saarbruecken, P.O. Box 151150, D-66041 Saarbruecken, Germany |
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| Abstract: | Ni80Fe20/SiO2/Cu composite wires of Cu core 60 μm in diameter and coated with layers of SiO2 and Ni80Fe20 were prepared by RF magnetron sputtering. The influences of the insulator layer thickness, the measurement mode and the magnitude of the driving current on the giant magneto-impedance (GMI) effect were investigated. The results showed that there was an optimum thickness of the insulator layer and the driving current can influence the shape of the MI curve. Resonance enhancement of the GMI was found in the new measurement mode. The results are discussed by taking account of the electromagnetic interactions. |
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| Keywords: | 75 50 &minus y 75 70 Cn |
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