Electronic-structure modifications induced by surface segregation in La0.65Pb0.35MnO3 thin films

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

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Using spin-polarized inverse photoemission and X-ray absorption spectroscopy techniques, we show that the electronic structure of La0.65Pb0.35MnO3 thin films depends on the composition at the surface. With a gentle annealing procedure, the surface provides a maximum of 80% spin asymmetry at 0.5 eV above the Fermi level in spite of extensive Pb segregation. A heavily annealed (restructured) surface exhibits a reduced surface "ordering" temperature of 240 K (compared to the approximately 335 K bulk value) as well as a reduced spin asymmetry value of 40% at 0.5 eV above Fermi energy.

Original languageEnglish (US)
Pages (from-to)722-728
Number of pages7
JournalEurophysics Letters
Volume56
Issue number5
DOIs
StatePublished - Dec 1 2001

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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