Answers are grounded in this paper and cite their sources.
Transmission and scanning electron microscopy have been used to characterize thin films of Fe oxide grown on (001)-oriented MgO using pulsed-laser deposition. Several films, each with a longer deposition time, and hence increasing thickness, were grown under similar conditions of oxygen pressure, deposition rate and substrate temperature. For shorter deposition times, i.e. thinner films, a spinel-structured Fe oxide film occurred, while for longer deposition times a corundum-structured Fe oxide film formed. In some instances it was found that the film had a mixture of the two structures of Fe oxide. The analysis of these films determined that the corundum-structured Fe oxide was being formed via a transformation from the spinel structure. This transformation process led to interesting thin-film morphologies and epitactic alignments.
No takes yet. Share an insight, caveat, or question.
Joseph R. Michael Matthew T. Johnson (1999) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: