Characterisation by EPR analysis of the magnetic phase diagram of RFe12−xMxXy compounds (R=rare earth metal, M=transition metal, X=H, C)

Abstract

The compounds of formula RFe12−xMx with R=rare earth, M=d-metal and their interstitial derivatives, generally exhibit ferro- or ferrimagnetic properties. Preliminary EPR analyses performed on ErFe12−xMnxXy (x=5, 4, 3; X=H, C) and NdFe10.7V1.3Cy (y=0, 1) are reported. A direct correlation between the different types of electron resonance traces and the bulk magnetic properties is established, clearly revealing the ferromagnetic and the paramagnetic domains of the magnetic diagram of phases. No spin reorientation transition (SRT) was evidenced for any of the studied compounds.