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

Document Type

Article

Publication Date

5-8-2007

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. © 2007 The American Physical Society.

Identifier

34347228152 (Scopus)

Publication Title

Physical Review B Condensed Matter and Materials Physics

External Full Text Location

https://doi.org/10.1103/PhysRevB.75.174413

e-ISSN

1550235X

ISSN

10980121

Issue

17

Volume

75

Grant

0512196

Fund Ref

National Science Foundation

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