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A Study of the MBE Growth of MGO on The FE(001) Surface

Published online by Cambridge University Press:  15 February 2011

J.L. Vassent ,
M. Dynna ,
G. Patrat ,
B. Gilles  and
A. Marty
J.L. Vassent
Affiliation:
CEA/Département de Recherche Fondamentale sur la Matière Condensdée SP2M/MP, 38054 Grenoble Cédex 9, France
M. Dynna
Affiliation:
CEA/Département de Recherche Fondamentale sur la Matière Condensdée SP2M/MP, 38054 Grenoble Cédex 9, France
G. Patrat
Affiliation:
Laboratoire de Cristallographie, CNRS, BP166, 38042 Grenoble Cedex 9, France
B. Gilles
Affiliation:
LTPCM, ENSEEG, BP 75, 38402 Saint Martin d'Hères, France
A. Marty
Affiliation:
CEA/Département de Recherche Fondamentale sur la Matière Condensdée SP2M/MP, 38054 Grenoble Cédex 9, France
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Abstract

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° 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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 357: Symposium C – Structure and Properties of Interfaces in Ceramics , 1994 , 189
Copyright
Copyright © Materials Research Society 1995

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