Sub-unit cell layer-by-layer growth of Fe3O4, MgO, and Sr2RuO4 thin films

Details Sub-unit cell layer-by-layer growth of Fe3O4, MgO, and Sr2RuO4 thin films Sub-unit cell layer-by-layer growth of Fe3O4, MgO, and Sr2RuO4 thin films

2002-08-26

arxiv.org/abs/cond-mat/0208495v1

Physics

Condensed Matter

Materials Science

Scientific paper

10.1007/s00339-003-2105-9

The use of oxide materials in oxide electronics requires their controlled epitaxial growth. Recently, it was shown that Reflection High Energy Electron Diffraction (RHEED) allows to monitor the growth of oxide thin films even at high oxygen pressure. Here, we report the sub-unit cell molecular or block layer growth of the oxide materials Sr2RuO4, MgO, and magnetite using Pulsed Laser Deposition (PLD) from stoichiometric targets. Whereas for perovskites such as SrTiO3 or doped LaMnO3 a single RHEED intensity oscillation is found to correspond to the growth of a single unit cell, in materials where the unit cell is composed of several molecular layers or blocks with identical stoichiometry, a sub-unit cell molecular or block layer growth is established resulting in several RHEED intensity oscillations during the growth of a single unit-cell.

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