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Report No.

Local structures and magnetic properties of fullerene-Co systems studied by XAFS and XMCD analyses

Hojo, Ikuko*; Koide, Akihiro*; Matsumoto, Yoshihiro; Maruyama, Takashi*; Nagamatsu, Shinichi*; Entani, Shiro; Sakai, Seiji; Fujikawa, Takashi*

In this work we have measured Co K- and L$$_{2,3}$$-edge X-ray absorption near edge structure (XANES) and Co L$$_{2,3}$$-edge X-ray magnetic circular dichroism (XMCD) spectra, and also carried out their calculations for C$$_{60}$$Co$$_x$$ compounds. The observed XANES and XMCD are sensitive to the Co concentration. In the low density region ($$x$$=1.0-1.5), one Co is surrounded by three C$$_{60}$$ balls. The Co L$$_{2,3}$$-edge XMCD analyses gives the spin magnetic moment on Co in the range 0.5-0.9 $$mu_B$$.



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