The effect of small additions of yttrium,lanthanum, and cerium oxides on some magnetic characteristics of magnesium-manganese ferrites and the X-ray spectra of transition metals in them

Summary We have studied the effect of lanthanum, cerium, and yttrium oxide admixtures on the magnetic characteristics of manganese and magnesium-manganese ferrites. We have shown that this effect differs for various rare earths and depends on their content in the ferrite.We have studied the fine structure of x-ray absorption spectra of iron and manganese in ferrites with varying content of rare earth additions. On the basis of an analysis of the experimental material we have drawn preliminary conclusions on the possible mechanism of the effect of admixtures on the energy state of the atoms of the main components in the ferrites.