X-ray magnetic circular dichroism in FeZrB amorphous alloys: the influenceof the tensile stress

We present X-ray Magnetic Circular Dichroism experiments (XMCD) on the Fe K edge of FeZrB metallic glasses performed under tensile stress. In these co mpounds the application of tensile stresses produces a large increase of th e Curie Temperature. The XMCD signal presents the features expected for a w eak ferromagnet but a gradual enhancement of the ferromagnetism is observed as boron and zirconium concentrations increase. The main effect of the ten sile stress is to increase the density of states at the Fermi level as dedu ced from the increment of the amplitude of the XMCD signal with the stress.