Local structure of multiferroic Tb Mn2 O5: Evidence for an anomalous Tb-O distribution

T. A. Tyson, M. Deleon, S. Yoong, S. W. Cheong

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16 Scopus citations

Abstract

The temperature dependent local structure of Tb Mn2 O5 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 ∼180 K. The distributions sharpen below the Tb magnetic ordering temperature (∼10 K). The distortions in the Tb-O distribution, away from the Pbam structure, are consistent with rotations of the Mn Ox 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.

Original languageEnglish (US)
Article number174413
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume75
Issue number17
DOIs
StatePublished - May 8 2007

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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