Strain-induced crystal structure change in ultrathin films of Pr 0.7Sr0.3MnO3

Ian MacLaren, Zhong Lin Wang, H. S. Wang, Qi Li

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

Ultrathin films (<30 nm) of Pr0.7Sr0.3MnO 3 on LaAlO3 have been studied using transmission electron microscopy (TEM). It was shown that the films are highly uniform and defect-free, and that they are coherently strained to the smaller lattice parameter of the substrate, resulting in a tetragonal expansion perpendicular to the film plane and a change of crystal structure from the ordered orthorhombic of bulk materials to a simple tetragonal perovskite. The variation of the tetragonality with distance from the interface was also determined from high-resolution TEM images.

Original languageEnglish (US)
Pages (from-to)1406-1408
Number of pages3
JournalApplied Physics Letters
Volume80
Issue number8
DOIs
StatePublished - Feb 25 2002

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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