A structural study of electrodeposited Fe on n-GaAs(001)

被引:15
|
作者
Svedberg, E. B. [1 ]
Mallett, J. J.
Bendersky, L. A.
Roy, A. G.
Egelhoff, W. F., Jr.
Moffat, T. P.
机构
[1] NIST, Gaithersburg, MD 20899 USA
[2] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
关键词
D O I
10.1149/1.2353782
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The microstructure of Fe films electrodeposited onto n-GaAs(001) from FeCl2 and FeSO4-(NH4)(2)SO4 electrolytes was examined by X-ray and electron diffraction. Symmetrical theta-2 theta X-Ray diffraction from films deposited from chloride solutions indicates a dominant (001) texture with the presence of additional minority orientations. In contrast, deposition from an ammonium sulfate electrolyte yields films that only exhibit (001) scattering in the theta-2 theta geometry. Transmission electron microscopy (TEM) cross-sectional images of films grown in chloride solutions reveal intermittent cube-on-cube epitaxy that is also evident in plan view TEM dark field images. Interestingly, X-ray pole figure measurements for all specimens examined reveal an additional (221) orientation that is undetectable by symmetric theta-2 theta diffraction. The (221) oriented material most likely derives from twinning of (001) oriented grains during growth. (c) 2006 The Electrochemical Society.
引用
收藏
页码:C807 / C813
页数:7
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