Abstract
4f photoemission spectra of TbRh reveal a broadening of the 8 S term of the 4f 7 final-state multiplet into a double peak while multiplet components at higher binding energies remain unaffected. As in case of Pr 5Rh 4 and Nd 5Rh 4, where similar but larger splittings have been observed, the phenomenon is analyzed in the light of a single-impurity Anderson model. As a result of this analysis, the hybridization parameter is found to decrease monotonously by a factor of 1.5 in going from the Pr–Rh to the TbRh compound as expected from calculated f→d hopping matrix elements. Two percent admixture of divalent 4f 9 configurations to the trivalent Tb 4f 8 ground state are concluded.
Published Version
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