C$\text{}_{60}$FeC$\text{}_{60}$ Complexes in Fe Intercalated Fullerite Studied by X-Ray Absorption

The aim of Fe K edge XANES and EXAFS studies is to reveal the local structure around Fe ions in C$\text{}_{60}$Fe$\text{}_{x}$ intercalated fullerites. The measurements are performed in transmission mode at LN$\text{}_{2}$ temperature for C$\text{}_{60}$Fe$\text{}_{x}$ powder samples and other materials: ferrocene Fe(C$\text{}_{5}$H$\text{}_{5}$)$\text{}_{2}$, Fe metal foil and α-Fe$\text{}_{2}$O$\text{}_{3}$. The main result is that the XAFS spectra of the C$\text{}_{60}$Fe$\text{}_{2}$ intercalate is almost identical to that of ferrocene and very different from α-Fe and α-Fe$\text{}_{2}$O$\text{}_{3}$. The results support opinion that in the C$\text{}_{60}$Fe$\text{}_{x}$ intercalates the ferrocene-like bonds in complexes C$\text{}_{60}$FeC$\text{}_{60}$ are formed. Additionally, the XAFS spectra showed that neither remarkable amount of Fe metallic clusters nor oxidized iron particles are present in the C$\text{}_{60}$Fe$\text{}_{x}$ sample.