Study on Phase Structure,Dielectric and Magnetic Properties of BST/YIG Composites

A series of composites were synthesized by solid-state reaction,with ferroelectric powder of BST and ferromagnetic powder of YIG as raw materials.Dielectric and magnetic properties of ferroelectric-ferromagnetic composites were tested.The results show that the ferroelectric/ferromagnetic composites sintered at proper temperature consist of ferroelectric phase and ferromagnetic phase.The composite materials xBST-(1-x)YIG(x=0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0) exhibit excellent dielectric and magnetic properties.Both e′ and e″ increase with the increase of BST content,and the dielectric resonant frequency shifts to a higher frequency with YIG content increasing.The permeability rises with BST content decreasing.The resonance frequency and high frequency characteristics of YIG are improved by adding BST.