Polar atomic displacements in multiferroics observed via anomalous x-ray diffraction
- Authors
- Azimonte, C.; Granado, E.; Terashita, H.; Park, S.; Cheong, S-W.
- Issue Date
- Jan-2010
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW B, v.81, no.1
- Journal Title
- PHYSICAL REVIEW B
- Volume
- 81
- Number
- 1
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/57348
- DOI
- 10.1103/PhysRevB.81.012103
- ISSN
- 2469-9950
2469-9969
- Abstract
- The minute polar atomic displacements in multiferroics are shown to be within the reach of crystallography. A nonconventional methodology with anomalous x-ray diffraction is employed to investigate such displacements in DyMn2O5 with giant magnetoelectric coupling and two distinct Mn3+ and Mn4+ sites. Intensity differences of a selected Bragg reflection were measured as the direction of electric polarization is switched by a poling field. A significant differential effect, which is strongly enhanced at energies near and above the Mn K edge, was observed near and below the ferroelectric transition temperature, T-c similar to 40 K. The direct participation of ionic displacements in the ferroelectric polarization, particularly the Mn3+ sublattice, is demonstrated, dismissing a purely electronic mechanism for the multiferroicity.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.