X-ray magnetic circular dichroism probe of the Rh magnetic moment instability in Fe1-xRhx alloys near the equiatomic concentration

X-ray magnetic circular dichroism (XMCD) measurements performed at the Rh L2,3 edges and Pd L₃ edge in Fe0.51Rh0.49 and Fe1.005(Rh0.85Pd0.15)0.995 evidence the instability of the Rh magnetic moment (μRh) through the ferromagnetic-antiferromagnetic transition and demonstrate the induced nature of both μRh and μPd. In the case of Fe0.51Rh0.49 these experiments have also revealed the existence of a ferromagnetic ground state at low temperatures in which μRh~0.7μB.