Strain-induced crystal structure change in ultrathin films of Pr0.7Sr0.3MnO3

MacLaren, I. , Wang, Z. L., Wang, H.S. and Li, Q. (2002) Strain-induced crystal structure change in ultrathin films of Pr0.7Sr0.3MnO3. Applied Physics Letters, 80(8), pp. 1406-1408. (doi: 10.1063/1.1453482)

Abstract

Ultrathin films (<30 nm) of Pr0.7Sr0.3MnO3Pr0.7Sr0.3MnO3 on LaAlO3LaAlO3 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.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: MacLaren, Dr Ian
• Authors: MacLaren, I., Wang, Z. L., Wang, H.S., and Li, Q.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Applied Physics Letters
• Publisher: AIP Publishing
• ISSN: 0003-6951
• ISSN (Online): 1077-3118