Spectroscopic evidence against Rh4ditinerant ferromagnetism inCeRh3B2

Valence-band photoemission and $I_{\mathrm{III}}$-edge x-ray absorption studies were performed on R${\mathrm{Rh}}_3$ ${\mathrm{B}}_2$ (R = La, Ce, and Pr) compounds in order to explore the origin of the anomalously high magnetic ordering temperature of ${\mathrm{CeRh}}_3$ ${\mathrm{B}}_2$. From the low density of Rh 4d states at $E_F$ and the approximate trivalency of Ce, itinerant magnetism in the Rh 4d band can be excluded. Instead, the magnetism is proposed to originate from Ce moments, enhanced by 4f hybridization with Rh d orbitals.