Crystal structure and valence distribution of [(LaMnO 3) m(SrMnO 3) m] n artificial superlattices

Hironori Nakao, Jun Nishimura, Youichi Murakami, Akira Ohtomo, Tomoteru Fukumura, Masashi Kawasaki, Takashi Koida, Yusuke Wakabayashi, Hiroshi Sawa

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The crystal structure of [(LaMnO 3) m(SrMnO 3) m] n artificial superlattices and the valence distribution of Mn ions have been studied using the X-ray scattering technique. The stacking structures were determined by the scattering intensities in the out-of-plane direction. The Mn valence distributions were evaluated by the energy dependence of the scattering intensity near the Mn K-edge, which was analyzed on the basis of the obtained crystal structures. The result indicates that the Mn valence becomes 3+ (4+) in the LaMnO 3 (SrMnO 3) layers, and the valence has an intermediate value between 3+ and 4+ only at the interface between LaMnO 3 and SrMnO 3 layers. We have also clarified that all the films are insulators independent of the periodicity m.

Original languageEnglish
Article number024602
Journaljournal of the physical society of japan
Volume78
Issue number2
DOIs
Publication statusPublished - 2009 Feb 1

Keywords

  • Charge ordering
  • Resonant X-ray scattering
  • Superlattice structure

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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