Fe_3O_4中铁离子电子态的XDAFS研究

RESEARCH OF ELECTRONIC STATES OF IRON IONS IN Fe_3O_4 BY MEANS OF XDAFS

用选择Ｂｒａｇｇ峰的Ｘ射线衍射异常精细结构（ＸＤＡＦＳ）方法测定了Ｆｅ３Ｏ４的ＸＤＡＦＳ谱．结果显示，４００衍射的谷位在２２０衍射谷位的高能量一侧，其位移量约１．４ｅＶ，这表明Ｆｅ３Ｏ４中处于不同晶体学等效位置的两种铁离子的内层电子结构不同．

XANES spectrums of Fe3O4 have been determined by means of X-raydiffraction anomalous fine taucture (XDAFS) with synchrotron radiation. Thevalley position of the 400 diffraction is a side of the high energy of the 220 valleyposition. The displacement quantity is about 1.4eV. This result shows thatelectronic states of two kinds of iron ions which lie in the different equivalentlattice positions in Fe3O4 are different.