Orbital and charge ordering in LaSr2Mn2O7 observed by resonant X-ray scattering

Yusuke Wakabayashi, Youichi Murakami, Ichiro Koyama, Tsuyoshi Kimura, Yoshinori Tokura, Yutaka Moritomo, Kazuma Hirota, Yasuo Endoh

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34 Citations (Scopus)


Orbital and charge ordering phenomena in bilayered perovskite manganite LaSr2Mn2O7 have been studied by resonant X-ray scattering. Superlattice reflections corresponding to these orderings are observed below 210K. The in-plane and stacking structure of the orbital and charge order is determined from these reflections. The anisotropy of the anomalous atomic scattering factor of Mn3+ in the orbital ordered state is observed in the azimuthal angle dependence of the reflections. The anisotropy is attributed to the band dispersion of 4p level due to the layered structure as well as the orbital order. In the course of this study, we have found that charge and orbital orderings collapse simultaneously, maintaining the same correlation lengths with further decreasing temperature.

Original languageEnglish
Pages (from-to)2731-2734
Number of pages4
JournalJournal of the Physical Society of Japan
Issue number9
Publication statusPublished - 2000 Sept


  • Charge order
  • Layered structure
  • Orbital order
  • X-ray scattering


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