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Kinetic versus strain formation of self-organized nanoholes in manganite thin films

AuthorsKonstantinović, Z.; Santiso, José ; Balcells, Lluis ; Martínez Perea, Benjamín
Issue DateNov-2010
PublisherInstitute of Physics Publishing
CitationNanotechnology 21(46): 465601 (2010)
AbstractWe report on the formation of self-organized rows of pits in highly epitaxial La2/3Sr1/3MnO3 thin films on top of substrates having different structural misfits by rf magnetron sputtering. The best-defined pits form in coherently grown films at a low misfit irrespective of its nature (tensile or compressive stress). It is also found that the pit rows align along the step edges, which indicates in-phase growth instability with the step edges, irrespective of the misfit. However, out-of-phase pit rows are also found when the terrace width increases due to a decrease of the miscut angle. Pit's volume scales inversely with the lattice mismatch suggesting that structural strain alone does not favor the formation of pits. The formation of pits is analyzed within a thermodynamic model.
Description6 páginas, 4 figuras, 1 tabla.
Publisher version (URL)http://dx.doi.org/10.1088/0957-4484/21/46/465601
Appears in Collections:(CIN2) Artículos
(ICMAB) Artículos
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