Electromagnetic interaction in composite structure materials has been a crucial physical mechanism to optimize magnetic property of magnetic devices. In this paper, the composite ribbons of FINEMET coated with reduced graphene oxide (rGO) were successfully prepared by electroless plating method at different pH values. The structure, morphology and magnetic properties of the FINEMET/rGO composite ribbons were characterized by X-Ray diffraction, Raman spectroscopy, scanning electron microscope, giant magneto-impedance (GMI) analysis and vibrating sample magnetometer techniques, respectively. The results showed that the peak position field of composite ribbon first decreases and then increases with the variation of pH value, which indicated that there may be existed electromagnetic interaction and stress between rGO and the FINEMET ribbon. The electromagnetic interaction may lead to the redistribution of current density and the change of skin depth. An interpretation in terms of electromagnetic interaction between rGO and FINEMET ribbon was proposed, which provided a new perspective for analyzing the variation in GMI effect of composite materials.

复合结构材料中的电磁相互作用一直是优化磁性器件磁性能的关键物理机制。本文通过化学镀方法在不同的pH值下成功制备了还原型氧化石墨烯（rGO）涂层的FINEMET复合带。通过X射线衍射，拉曼光谱，扫描电子显微镜，巨磁阻抗（GMI）分析和振动样品磁强计技术分别对FINEMET / rGO复合带的结构，形态和磁性能进行了表征。结果表明，复合带的峰位场随pH值的变化先减小后增大，表明rGO与FINEMET带之间可能存在电磁相互作用和应力。电磁相互作用可能导致电流密度的重新分布和趋肤深度的变化。提出了rGO与FINEMET碳带之间电磁相互作用的解释，为分析复合材料的GMI效应提供了新的视角。