X-ray absorption near the edge structure and x-ray photoelectron spectroscopy studies on pyrite prep

• 作 者: 张辉 刘应书 王宝义 魏龙 奎热西 钱海杰
• 机 构: School of Mechanical Engineering,University of Science and Technology Beijing,Multidisciplinary Rese
• 出 处: Chinese Physics B
• 发表日期: 2004年期
• 关键词: pyrite photoelectron magnetron octahedral thermally analysed orbit symmetry sput

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 2g and e 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.

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. Band gap of the pyrite agrees well with the optical band gap obtained by a spectrophotometer. octahedral symmetry of pyrite leads to the splitting of the d orbit into t 2g and eg levels. the high spin and low spin states were analyzed 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.