THE EFFECT OF VARIATION OF THE BISMUTH CONTENT ON THE MAGNETIC PROPERTIES OF Y3-XBiXFe5O12 SYSTEM

Abstract

Y_3.0-xBi_xFe₅O₁₂ samples were prepared via conventional technique. Four samples of Y_3.0-xBi_xFe₅O₁₂ were prepared (x = 0.2, 0.4, 0.6, 0.8). The samples were then studied for general variation of Curie temperature and initial permeability with bismuth content. All the compounds prepared were identified by X-Ray Diffraction. Sample with the highest content of bismuth, sample Y_2.2Bi_0.8Fe₅O₁₂, recorded the highest Curie temperature and the highest initial permeability. The bismuth is speculated to give rise to the strong super-exchange interaction and this results in the increase of Curie temperature.  Additionally, the bismuth content works as a sintering aid to assist grain growth during sintering and hence enhances the initial permeability.