TEMPERATURE-DEPENDENT LOCAL GEOMETRIES IN THE SYSTEM AL(100)-C(2X2)-NA - A SURFACE EXTENDED X-RAY-ABSORPTION FINE-STRUCTURE STUDY

被引：42

作者：

AMINPIROOZ, S ^{[1
]}

SCHMALZ, A ^{[1
]}

BECKER, L ^{[1
]}

PANGHER, N ^{[1
]}

HAASE, J ^{[1
]}

NIELSEN, MM ^{[1
]}

BATCHELOR, DR ^{[1
]}

BOGH, E ^{[1
]}

ADAMS, DL ^{[1
]}

机构：

[1] AARHUS UNIV,INST PHYS,DK-8000 AARHUS,DENMARK

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.46.15594

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The adsorption of Na on Al(100) at 140 and 300 K has been studied by surface extended x-ray-absorption fine-structure experiments. An analysis of the measurements shows that the local geometry in the c (2 X 2)-Na phases formed at each temperature is completely different. At 140 K the Na atoms occupy fourfold hollow sites, whereas at 300 K a model is favored where the Na atoms lie beneath a reconstructed surface Al layer. Warming to 300 K causes an irreversible transformation of the low-temperature structure to the room-temperature structure.

引用

页码：15594 / 15597

页数：4

共 16 条

[1] INTERMIXING IN THE NA ON AL(111) SYSTEM [J].