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Epitaxial growth of Fe islands on LaAlO sub(3) (001) substrates

Fe deposits were performed on LaAlO sub(3) (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 diff...

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Published in:	Journal of crystal growth 2014-04, Vol.391, p.121-129
Main Authors:	Zanouni, Mohamed, Azzouz, Chiraz Ben, Derivaz, Mickael, Dentel, Didier, Denys, Emmanuel, Diani, Mustapha, Aouni, Abdessamad, Morales, Francisco M, Manuel, Jose M, Garcia, Rafael, Bischoff, Jean-Luc
Format:	Article
Language:	English
Subjects:	Diffraction Epitaxial growth Iron Islands Reflection Temperature dependence X-ray photoelectron spectroscopy X-rays
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container_title	Journal of crystal growth
container_volume	391
creator	Zanouni, Mohamed Azzouz, Chiraz Ben Derivaz, Mickael Dentel, Didier Denys, Emmanuel Diani, Mustapha Aouni, Abdessamad Morales, Francisco M Manuel, Jose M Garcia, Rafael Bischoff, Jean-Luc
description	Fe deposits were performed on LaAlO sub(3) (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 LaAlO sub(3)(001) lattices are brought into coincidence by a 45[degrees] 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.
doi_str_mv	10.1016/j.jcrysgro.2014.01.001
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subjects	Diffraction Epitaxial growth Iron Islands Reflection Temperature dependence X-ray photoelectron spectroscopy X-rays
title	Epitaxial growth of Fe islands on LaAlO sub(3) (001) substrates
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