PII: S0039-6028(97)00132-5
Nature of multilayer steps on the {100} cleavage planes of MgO single crystals F. Sanza, *, K. Sangwala, b, J. Servata and P. Gorostizaa a Departament de Quimica Fisica, Universitat de Barcelona, Marti i Franques 1 08028 Barcelona Spainb Department of Physics, Technical University of Lublin, ul. Nadbystrzycka 38 20-618 Lublin Poland Received 9 July 1996; accepted 24 February 1997. Available online 11 March 1999.
F. Sanza, *, K. Sangwala, b, J. Servata and P. Gorostizaa
The results of an AFM study of the nature of multilayer steps on the {100} cleavage faces of MgO crystals is described and discussed. The results show that (i) multilayer cleavage steps of a width between 55 and 590 nm and of a slope between about 1 and 8° are stable, (ii) the terminal planes of multilayer steps are composed of high-index vicinal faces with indices (7 0 1), (42 0 1) and (77 0 1) for the <010> steps with respect to the (1 0 0) cleavage, which do not correspond to the low-index planes of the equilibrium form of MgO crystals, and (iii) that the curved parts of the profile of a multilayer cleavage step in its upper and lower regions extend to a distance equal to the width of the step.
Author Keywords: Atomic force microscopy; Faceting; Magnesium oxide; Single crystal surfaces; Surface structure
*Corresponding author.
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