Epitaxial growth of Fe islands on LaAlO3 (001) substrates

被引：0
|
作者：
Zanouni, Mohamed [1 ,2 ]
Ben Azzouz, Chiraz [3 ]
Derivaz, Mickael [2 ]
Dentel, Didier [2 ]
Denys, Emmanuel [2 ]
Diani, Mustapha [1 ]
Aouni, Abdessamad [1 ]
Morales, Francisco M. [2 ,4 ,5 ]
Manuel, Jose M. [2 ,4 ,5 ]
Garcia, Rafael [4 ,5 ]
Bischoff, Jean-Luc [2 ]
机构：
[1] Fac Sci & Tech Tanger, ERMMM, Fac Sci & Tech, Tanger, Morocco
[2] Univ Haute Alsace, CNRS, Inst Sci Mat Mulhouse IS2M, Mulhouse 68093, France
[3] Fac Sci, Unite Spectrometre Surfaces, Bizerte 7021, Tunisia
[4] Univ Cadiz, Fac Ciencias, Dpto Ciencia Mat, Cadiz 11510, Spain
[5] Univ Cadiz, Fac Ciencias, IM & QI, Cadiz 11510, Spain
来源：
JOURNAL OF CRYSTAL GROWTH | 2014年 / 391卷
关键词：
Interfaces; Nanostructures; Pcrovskites; Oxides; Metals; PHOTOELECTRON DIFFRACTION; 100; SRTIO3; SURFACE; FILMS; ENERGY; IRON; XPS; SI; SCATTERING; INTERFACE;
D O I：
10.1016/j.jcrysgro.2014.01.001
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Fe deposits were performed on LaAlO3 (001) by molecular beam epitaxy at different substrate temperatures. Chemical and structural characterizations were carried out in-situ, by X-ray photoelectron spectroscopy (XPS), reflection high-energy electron diffraction (RHEED), X-ray photoelectron diffraction (XPD), and ex-situ by high-resolution transmission electron microscopy ( HRTEM). This temperature dependence study indicates that the growth of Fe is epitaxial in a tight temperature window around 500 degrees C with a single epitaxial relationship, where the Fe and LaAlO3(001) lattices are brought into coincidence by a 45 rotation around the common [001] axis. This typical configuration via Fe-O bonds formation at the interface allows a minimization of the elastic strain inside Fe islands which follow a Volmer-Weber growth mode. Beyond a given thickness, and in agreement with the strain relaxation, Fe islands exhibit (001) facets, leading to islands coalescence and a possible iron 2D layer formation. (C) 2014 Elsevier B.V. All rights reserved
引用
收藏
页码：121 / 129
页数：9
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