X-ray absorption near the edge structure and x-ray photoelectron spectroscopy studies on pyrite prepared by thermally sulfurizing iron films
Zhang Hui(张辉)a)b)†, Liu Ying-Shu(刘应书)a), Wang Bao-Yi(王宝义)b), Wei Long(魏龙)b), Kui Re-Xi(奎热西)b), and Qian Hai-Jie(钱海杰)b)
a School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China; b Multidisciplinary Research Center, Chinese Academy of Sciences, Beijing 100049, China
Abstract This paper reports how pyrite films were prepared by thermal sulfurization of magnetron sputtered iron films and characterized by x-ray absorption near edge structure spectra and x-ray photoelectron spectroscopy on a 4B9B beam line at the Beijing Synchrotron Radiation Facility. The band gap of the pyrite agrees well with the optical band gap obtained by a spectrophotometer. The octahedral symmetry of pyrite leads to the splitting of the d orbit into $t_{\rm 2g}$ and $e_{\rm g}$ levels. The high spin and low spin states were analysed through the difference of electron exchange interaction and the orbital crystal field. Only when the crystal field splitting is higher than 1.5 eV, the two weak peaks above the white lines can appear, and this was approved by experiments in the present work.
Received: 06 November 2008
Revised: 17 November 2008
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of
China (Grant No 102750770).
Cite this article:
Zhang Hui(张辉), Liu Ying-Shu(刘应书), Wang Bao-Yi(王宝义), Wei Long(魏龙), Kui Re-Xi(奎热西), and Qian Hai-Jie(钱海杰) X-ray absorption near the edge structure and x-ray photoelectron spectroscopy studies on pyrite prepared by thermally sulfurizing iron films 2009 Chin. Phys. B 18 2734
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