Structure evolution of Ni ultrathin films on Pt(111)

被引：28
|
作者：
Su, CW [1 ]
Ho, HY [1 ]
Shern, CS [1 ]
Chen, RH [1 ]
机构：
[1] Natl Taiwan Normal Univ, Dept Phys, Taipei 116, Taiwan
来源：
SURFACE SCIENCE | 2002年 / 499卷 / 2-3期
关键词：
alloys; Auger electron spectroscopy; epitaxy; low energy electron diffraction (LEED); metallic films; nickel; platinum; surface structure; morphology; roughness; and topography;
D O I：
10.1016/S0039-6028(01)02022-2
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：
Low-energy electron diffraction and Auger electron spectroscopy were used to study the initial growth and the alloy formation of Ni ultrathin films on Pt(1 1 1) surface. Several interesting structural phases were observed in this system: pseudo-(1 x 1), (root3 x root3)R30degrees, coherent epitaxy, incoherent epitaxy, and (2 x 2). The phase diagram was determined by LEED. In addition, the formation of Ni-Pt alloy was investigated at various Ni coverages. The starting temperature for the alloy formation increases significantly as the Ni thin films turn into three-dimensional islands. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：103 / 108
页数：6
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