The effects of film-substrate mismatch on Pr0.7Ca0.3 MnO3thin films

I. Maclaren, Z. L. Wang, H. S. Wang, Q. Li

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

The structures of Pr0.7Ca0.3MnO3thin films on LaA1O3(001) and NdGaO3(001) substrates were investigated using transmission electron microscopy. These substrates induce a significant compressive strain and a slight tensile strain respectively on the film, and quite different microstructures were found in the two cases. Many complex tangles of dislocations were found in the film on LaAlO3and it had a two-domain structure where both domains have a [110] axis perpendicular to the film plane. The film on NdGaO3was mostly defect free, apart from occasional precipitates, which appeared to be NaCl-structure MnO3and displayed a single domain structure with the [001] axis perpendicular to the film. The difference in domain structure was explained on the grounds of misfit minimization, and the possible consequences of such a dependence of the domain structure on the substrate for the magnetic properties were discussed.

Original languageEnglish (US)
Pages (from-to)1405-1417
Number of pages13
JournalPhilosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Volume82
Issue number7
DOIs
StatePublished - May 2002

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)
  • Metals and Alloys

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