A study of the MBE growth of MgO on the Fe(001) surface
- CEA, Grenoble (France). Dept. de Recherche Fondamentale sur la Matiere Condensee
- CNRS, Grenoble (France). Laboratoire de Cristallographie
- ENSEEG, Saint Martin d`Heres (France)
The deposition of MgO on the Fe(001) surface has been carried out using electron beam evaporation. MgO is observed to grow epitaxially with a 45{degree} rotation between the Fe(001) and MgO(001) unit cell axes. Oscillations in the intensity of the RHEED specular beam are observed at room temperature showing that growth is two-dimensional. The relaxation of the in-plane lattice parameter during the growth at room temperature has been investigated in-situ by measuring the position of the RHEED streaks and ex-situ with GIXD experiments. Pseudomorphic growth is observed up to about five monolayers. Then the in-plane lattice parameter starts to evolve towards the MgO bulk parameter. HREM shows that the relaxation of MgO occurs via the generation of 1/2<011> misfit dislocations which are non-uniformly spaced at the Fe/MgO interface.
- OSTI ID:
- 94053
- Report Number(s):
- CONF-941144--; ISBN 1-55899-258-8
- Country of Publication:
- United States
- Language:
- English
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