▎ 摘　　要

Enhanced magnetoimpedance effect has been observed in graphene-based composite materials. Graphene papers were synthesized in large quantities using a modified chemical approach. Two methods have successfully prepared the FeNi/graphene/FeNi composite: electrochemical deposition and magnetron sputtering. For the electro-deposited sample, graphene paper turns crumpled and the deposited FeNi looks like flower-petals. While for sputtered FeNi films on graphene paper the layered structure was observed distinctly. Both samples show magnetoimpedance effect at low frequencies. Especially, the stratified FeNi/graphene/FeNi composite exhibited an enhanced magnetoimpedance effect, which is about 10 times as large as single FeNi film or multilayer film structure at low frequency. (C) 2013 Elsevier B.V. All rights reserved.