Abstract

The use of electric arc furnace prepared Dy Er Si3 series of compounds samples. By X-ray powder diffraction and magnetic measurements of the Dy Er substitution on Er5Si3 crystal structure and magnetic properties. The results show that: Dy Er Si3 series of compounds for the Mn5Si3-type crystal structure, with the Dy substitution increases, larger unit cell volume. When 0 ≤ x ≤ 2, the samples with the anti-ferromagnetic, paramagnetic Curie temperature is negative becomes positive; and x = 3,4, the samples show ferromagnetic, paramagnetic Curie temperature are all positive. Although the magnetic atoms and their interactions can affect great change on the magnetic properties, but all samples of the magnetic ordering transition temperature are well complied with De Gennes law. The crystal structures and magnetic properties of Dy Er Si3 compounds were studied by X-ray powder diffraction and magnetic measurements. The main results show that the crystal structures of all Dy Er Si3 compounds are Mn5Si3 type with space group of P63/mcm. With Dy concentration increasing, the unit cell volumes increase. The magnetization curves apparently indicate that Dy Er Si3 and DyxEr5-xSi3 exhibit antiferromagnetic and ferromagnetic behavior respectively. The Weiss temperatures are positive except Er5Si3. Moreover, the magnetic ordering temperatures obey De Gennes' law although the magnetic properties are affected by different magnetic atoms and the interaction among them