Morphology evolution in spinel manganite films deposited from an aqueous solution

Song Won Ko, Jing Li, Susan Trolier-Mckinstry

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Spinel manganite films were deposited by the spin spray technique at low deposition temperatures (< 100 °C). It was found that the film microstructure depends strongly on the degree of supersaturation (S) of the cations in the aqueous solution. For S < 2, well-crystallized isolated particles were deposited on the substrate, suggesting that heterogeneous nucleation with a low nucleation density dominates under these conditions. For 10 < S < 200, the as-grown films were continuous, with some porosity confirmed by transmission electron microscopy (TEM); the films could be densified by post-deposition annealing at 400 °C for 1 h. As-deposited films under these conditions were X-ray amorphous but the nanocrystalline spinel phase was confirmed by TEM. In this region, both homogeneous and heterogeneous nucleation occur. For S > 1000, agglomeration of small particles was dominant, which suggests that homogeneous nucleation is dominant during deposition. Heterogeneous nucleation was critical to obtain dense films.

Original languageEnglish (US)
Pages (from-to)129-135
Number of pages7
JournalThin Solid Films
Volume522
DOIs
StatePublished - Nov 1 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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