Abstract
We present an x-ray magnetic circular dichroism (XMCD) study performed on both ${\mathrm{Ho}}_{6}{\mathrm{Fe}}_{23}$ and ${\mathrm{Y}}_{6}{\mathrm{Fe}}_{23}$ compounds as a function of the temperature. The combined analysis of both Fe $K$-edge and Ho ${L}_{2,3}$-edge XMCD spectra recorded through the magnetic compensation transition allows us to disentangle the thermal dependence of both Fe and Ho magnetic moments in ${\mathrm{Ho}}_{6}{\mathrm{Fe}}_{23}$. In addition, contributions from Ho ions to the Fe $K$-edge XMCD signals and, conversely, from Fe ions to the Ho ${L}_{2,3}$-edge XMCD spectra have been clearly identified. These extra contributions, arising from the strong $\mathrm{Fe}(3d)\text{\ensuremath{-}}\mathrm{Ho}(5d)$ hybridization, have been isolated from the spectra and correlated with the magnetic state of both Ho and Fe ions surrounding the absorbing site. The influence of these contributions to the values of the orbital and spin moments derived by using sum rule analysis is also shown.
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