Relation between Magnetic Properties and the Structure of Iron-based Amorphous Alloys Determined by Electron Diffraction

Abstract

The method of complex study of magnetic effects and the changes of electron diffraction patterns during the heating of amorphous alloys is developed. The study was carried out on the alloys Fe-Si-B, that were the bands in amorphous state. The phase composition that correspond to registrated diffraction patterns and to magnetic effects is established. The equations that describe the magnetic effects and the changes of electron diffraction patterns are got in consequence with the data of X-ray investigation of amorphous alloys and the products of crystallization. The method of the differential thermomagnetic analysis with use of two etalon of armko-iron was applied [1]. The method of so-called internal etalon was applied also, in which a graduation of registered changes of magnetization was carried out using the well-known magnetic effect in the Curie point of carbide of iron T-Fe3C (fig. 1). We hoped that the information about the magnetization of amorphous foils Fe82Si2B16 and about their Curie points might be obtained by using the differential thermomagnetic analysis in the combination with X-ray study. The X-ray researches were carried out using standard diffractometry (Fe-anode). The thermomagnetic curve of heating and cooling of amorphous alloy Fe82Si2B16 is shown on fig. 2. The principal feature of the thermomagnetic curve is that this curve has the reversible character in the temperature interval from room temperature up to approximately 395qC (668 K). This reversible character of thermomagnetic