Surfactant properties of chemisorbed oxygen in Fe/Fe(001) homoepitaxy: a He diffraction study

被引：19

作者：

Bonanno, P

Canepa, M

Cantini, P

Moroni, R

Mattera, L

Terreni, S

机构：

[1] Univ Geneva, Ist Nazl Fis Mat, I-16146 Genoa, Italy

[2] Univ Geneva, Dipartimento Fis, CNR, CFSBT, I-16146 Genoa, Italy

来源：

SURFACE SCIENCE | 2000年 / 454卷

关键词：

atom-solid scattering and diffraction - elastic; growth; iron; low index single crystal surfaces; oxygen;

D O I：

10.1016/S0039-6028(00)00114-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

He diffraction measurements show that preadsorption of an O(1 x 1) phase on Fe(001) promotes two-dimensional growth of Fe at temperatures below 400 K, ill contrast to the island growth observed on the bare Fe(001) surface. Oxygen floats at the surface, acting as a surfactant. After repeated cycles of film annealing and Fe re-deposition, a beat is observed in the pattern of He reflectivity measured as a function of deposition time. The beat is assigned to the growth on surface domains characterized by a different surfactant efficiency. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

收藏

页码：697 / 701

页数：5

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