Fluorescence EXAFS study on local structures around Mn atoms in MnF<sub>2sub>–CaF<sub>2sub> superlattices and double hetero-structures on Si(111)
- 作者：Ofuchi ; H. ; Tabuchi ; M. ; Banshchikov ; A.G. ; Sokolov ; N.S. ; Yakovlev ; N.L. ; Takeda ; Y.
- 关键词：MnF<sub>2sub> ; Superlattice ; Structural transition ; Fluorescence extended X-ray absorption fine structure ; Molecular beam epitaxy ; 61.10.Ht ; 68.65+g ; 75.50.Bb ; EL ; SF ; CEC ; HD ; ME10 ; SVL ; XB
- 刊名：Applied Surface Science
- 出版年：2000
- 期刊代码：6_01694332
- 类别：ms
- 出版时间：June, 2000
- 卷：159-160
- 期：Complete
- 页码：220-224
- 文件大小：138 K
摘要
Local structures around Mn atoms in MnF<sub>2sub>–CaF<sub>2sub> superlattices and double heterostructures (DHSs) grown by molecular beam epitaxy (MBE) were investigated by fluorescence extended X-ray absorption fine structure (EXAFS) measurement. The EXAFS analysis revealed that in thin MnF<sub>2sub> layers (≤3 ML) fluorite structure that does not exist at normal conditions prevailed over the rutile structure, and the content ratio of the fluorite MnF<sub>2sub> strongly depended on the thickness of the MnF<sub>2sub> layer. Therefore, the thin MnF<sub>2sub> layers grew in fluorite structure on CaF<sub>2sub> and changed to the rutile structure with the increase of the MnF<sub>2sub> layer thickness.