Enhancement of giant magneto-impedance effect in Ni(80)Fe(20)/SiO(2)/Cu composite wires

Ni(80)Fe(20)/SiO(2)/Cu composite wires of Cu core 60 km in diameter and coated with layers of SiO(2) and Ni(80)Fe(20) 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- impedan...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2009-11, Vol.404 (20), p.3766-3770
Main Authors: Shi, Lingyan, Ruan, Jianzhong, Zhang, Juan, Zhao, Zhenjie, Gao, H B, Hartmann, U
Format: Article
Language:English
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Summary:Ni(80)Fe(20)/SiO(2)/Cu composite wires of Cu core 60 km in diameter and coated with layers of SiO(2) and Ni(80)Fe(20) 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.
ISSN:0921-4526
DOI:10.1016/j.physb.2009.06.139