Abstract
The 12 {h00} and 12 {hk0} type superlattice reflections in the electron diffraction patterns indicate the presence of ordered polar regions in Sr Bi1.6 Nd0.4 Nb2 O9. The research of x-ray Rietveld refinement and synchrotron radiation x-ray absorption fine structure spectroscopy determined that Nd3+ replaced Bi3+ in the Bi2 O2 layers for Sr Bi1.6 Nd0.4 Nb2 O9 and the relaxor behavior could be attributed to the disorder of Nd3+ and Bi3+ in the Bi2 O2 layers. The tilting angle of Nb O6 is obtained by Rietveld refinement method and the refinement result indicates that the substitution of Nd3+ for Bi3+ remarkably decrease the structural distortion, which leads to the lower transition temperature.
| Original language | English |
|---|---|
| Article number | 242902 |
| Journal | Applied Physics Letters |
| Volume | 91 |
| Issue number | 24 |
| DOIs | |
| State | Published - 2007 |