Abstract
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 language | English |
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Pages (from-to) | 2731-2734 |
Number of pages | 4 |
Journal | journal of the physical society of japan |
Volume | 69 |
Issue number | 9 |
DOIs | |
Publication status | Published - 2000 Sep |
Keywords
- Charge order
- Layered structure
- Orbital order
- X-ray scattering
ASJC Scopus subject areas
- Physics and Astronomy(all)