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2 Acta Physica Polonica A

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Fe Clusters in Fe Intercalated Fullerite

100%

Sobczak E. , Żymierska D. , Byszewski P. , Traverse A.

nr 2

447-450

The local structure around Fe ions in the C_{60}Fe_{2} 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 C_{60}Fe_{2} 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 Fe^{3+} ions bonded to fullerenes.

Structure Changes in Cz-Si Single Crystals Irradiated with Fast Oxygen and Neon Ions

63%

Datsenko L. , Żymierska D. , Auleytner J. , Klinger D. , Machulin V. , Klad'ko V. , Melnik V. , Prokopenko I. , Czosnyka T. , Choiński J.

Acta Physica Polonica A

1999

tom 96

nr 1

137-142

The research of the surface and the near-surface region of Cz-Si wafers irradiated with fast oxygen and neon ions of energy 4 MeV/u and dose 10^{14} particles/cm^{2} is presented. In our study several methods based on the Bragg case of X-ray diffraction using Ag K_{α_{1}}, as well as reflection high-energy electron diffraction and Nomarsky optical microscopy were used. It was shown that implantation with fast neon ions causes larger disturbances of silicon crystal structure than irradiation with oxygen ions.