The surface phases of the La0.65Pb0.35MnO3 manganese perovskite surface

C. N. Borca, B. Xu, T. Komesu, H. K. Jeong, M. T. Liu, S. H. Liou, P. A. Dowben

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

We have studied the surface composition and structure of colossal magneto-resistive perovskite thin films of La0.65Pb0.35MnO3. Depending on the annealing treatments, the thin film surface exhibits wildly different behavior and composition. With a gentle annealing procedure, the surface is dominated by appreciable Pb segregation, whereas a heavily annealed surface undergoes an irreversible restructuring into a Ruddlesden-Popper phase (La1-xPbx)2MnO4. The measured effective Debye temperatures of the two surfaces shows that the Pb-rich La0.65Pb0.35MnO3 surface region is softer than the surface of the Ruddlesden-Popper phase.

Original languageEnglish (US)
Pages (from-to)L346-L352
JournalSurface Science
Volume512
Issue number1-2
DOIs
StatePublished - Jun 20 2002

Keywords

  • Manganese
  • Surface segregation
  • Surface structure, morphology, roughness, and topography
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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