A Resonant soft x-ray powder diffraction study to determine the orbital ordering in A-site ordered SmBaMn2O6

M. Garcia-Fernandez; U. Staub; Y. Bodenthin; S. M. Lawrence; A. M. Mulders; C. E. Buckley; S. Weyeneth; E. Pomjakushina; K. Conder

doi:10.1103/PhysRevB.77.060402

A Resonant soft x-ray powder diffraction study to determine the orbital ordering in A-site ordered SmBaMn2O6

Strongly Correlated Electrons 2009-11-13 v1

Authors: M. Garcia-Fernandez , U. Staub , Y. Bodenthin , S. M. Lawrence , A. M. Mulders , C. E. Buckley , S. Weyeneth , E. Pomjakushina , K. Conder

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

Soft X-ray resonant powder diffraction has been performed at the Mn L2,3 edges of A-site ordered SmBaMn2O6. The energy and polarization dependence of the (1/2 1/2 0) reflection provide direct evidence for a (x2-z2)/(y2-z2) type orbital ordering in contrast to the single layer manganite. The temperature dependence of the reflection indicates an orbital reorientation transition at 210 K, below which the charge and orbital ordered MnO2 sheets show AAAA type of stacking. The concurring reduction of the ferromagnetic super exchange correlations leads to further charge localization.

Keywords

phase transitions charge ordering manganites

Cite

@article{arxiv.0801.2235,
  title  = {A Resonant soft x-ray powder diffraction study to determine the orbital ordering in A-site ordered SmBaMn2O6},
  author = {M. Garcia-Fernandez and U. Staub and Y. Bodenthin and S. M. Lawrence and A. M. Mulders and C. E. Buckley and S. Weyeneth and E. Pomjakushina and K. Conder},
  journal= {arXiv preprint arXiv:0801.2235},
  year   = {2009}
}

A Resonant soft x-ray powder diffraction study to determine the orbital ordering in A-site ordered SmBaMn2O6

Abstract

Keywords

Cite

Related papers