Abstract
VO 2 films were prepared by the pyrolysis of vanadium acetylacetonate on different substrates. It is shown that the temperature T k of the metal-insulator phase transition of these films is always lower than that in the bulk material and depends on the choice of substrate. The value of T k for these films on the same substrate decreases monotonically with decreasing film thickness. These effects are related to substrate-film interactions.
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