Fe Clusters in Fe Intercalated Fullerite |
| E. Sobczaka, D. Żymierskaa, P. Byszewskia,b and A. Traversec aInstitute of Physics, Polish Academy of Sciences, Al. Lotników 36/42, 02-668 Warsaw, Poland bInstitute of Vacuum Technology, Długa 44/50, 00-241 Warsaw, Poland cLURE, Centre Universitaire Paris-Sud, 91405 Orsay Cedex, France |
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| The local structure around Fe ions in the C60Fe2 fullerites before and after heat treatment in temperature of 850 K was investigated by means of Fe K edge X-ray absorption near edge structure and extended X-ray absorption near edge structure methods. The X-ray absorption measurements were performed at liquid nitrogen temperature using synchrotron radiation in transmission mode. The X-ray absorption near edge structure and extended X-ray absorption near edge structure studies showed that the heat treatment of the C60Fe2 fullerite at temperature 850 K causing an irreversible transition from monoclinic to fcc structure is accompanied with changes in the state of Fe ions, part of them forms clusters in bcc structure, while others turn to Fe3+ ions bonded to fullerenes. |
| DOI: 10.12693/APhysPolA.91.447 PACS numbers: 71.20.Tx, 61.46.+w, 61.10.Ht |