Local Structure of Multiferroic TbMn2O5: Evidence for an Anomalous Terbium Oxygen Distribution

T. A. Tyson; M. Deleon; S. Yoong; S. -W. Cheong

doi:10.1103/PhysRevB.75.174413

Local Structure of Multiferroic TbMn2O5: Evidence for an Anomalous Terbium Oxygen Distribution

Strongly Correlated Electrons 2009-11-13 v1

Authors: T. A. Tyson , M. Deleon , S. Yoong , S. -W. Cheong

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Abstract

The temperature dependent local structure of TbMn2O5 was determined by x-ray absorption spectroscopy. An anomalous Tb-O distribution is found. At high temperature it is broad but resolves into two distinct peaks below approximately 180 K. The distributions sharpen below the Tb magnetic ordering temperature (approximately 10 K). The distortions in the Tb-O distribution, away from the Pbam structure, are consistent with rotations of the MnOx polyhedra about the c-axis and suggest that Tb-O bond polarization may play a significant role in the observed ferroelectric properties of this system.

Keywords

multiferroic TbMn2O5 local structure X-ray absorption spectroscopy ferroelectric Tb-O distribution magnetic ordering

Cite

@article{arxiv.cond-mat/0702621,
  title  = {Local Structure of Multiferroic TbMn2O5: Evidence for an Anomalous Terbium Oxygen Distribution},
  author = {T. A. Tyson and M. Deleon and S. Yoong and S. -W. Cheong},
  journal= {arXiv preprint arXiv:cond-mat/0702621},
  year   = {2009}
}

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