Surface segregation and restructuring of colossal-magnetoresistant manganese perovskites La0.65Sr0.35MnO3

Hani Dulli, P. A. Dowben, S. H. Liou, E. W. Plummer

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163 Scopus citations

Abstract

We have investigated the surface chemical composition of crystalline films of La0.65Sr0.35MnO3 by angleresolved x-ray photoelectron spectroscopy. The surface composition was found to be significantly different from that of the bulk because of an appreciable Sr segregation. Furthermore, our study suggests that this Sr segregation has caused a major restructuring of the surface region characterized by the formation of a Ruddlesden-Popper phase (La,Sr)n+1 MnnO3n+1 with n=1. Segregation and restructuring in the surface region should be common in these doped perovskites and will have a profound impact on the electronic and magnetic properties of ultrathin films and magnetic tunneling junctions made of these materials.

Original languageEnglish (US)
Article numberR14629
Pages (from-to)R14629-R14632
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume62
Issue number22
DOIs
StatePublished - Dec 1 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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