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X-ray absorption near the edge structure and x-ray photoelectron spectroscopy studies on pyrite prepared by thermally sulfurizing iron films 下载免费PDF全文
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. 相似文献
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采用磁控溅射工艺制备了V2O5薄膜.通过改变制备工艺中基片温度和氧分压两个条件,研究了薄膜的晶相组成、表观形貌以及氧化物中钒和氧元素的化合价态.当基片温度升高时,V2O5薄膜中颗粒结晶由细长针状转变为平行于基片的片状,V5+状态保持不变,但723 K时氧结合能向高键能态移动.氧分压较低时,薄膜表面有部分V4+态存在,但存在较多的高键能氧,此时薄膜中晶粒尺寸较小.随着氧分压的提
关键词:
氧化钒
磁控溅射
相变薄膜
X射线光电子能谱 相似文献
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