Acute and obtuse rhombohedrons in the local structures of relaxor ferroelectric Pb(Mg 1/3 Nb 2/3)O 3

Wen Hu, Kouichi Hayashi, Kenji Ohwada, Jun Chen, Naohisa Happo, Shinya Hosokawa, Masamitu Takahasi, Alexei A. Bokov, Zuo Guang Ye

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

The local structures around Nb and Pb in the prototypical relaxor ferroelectric Pb(Mg1/3Nb2/3)O3 (PMN) were investigated by x-ray fluorescence holography. The separate atomic images of nearest Pb around Nb revealed acute and obtuse rhombohedral structures of the crystal unit cells. The Pb-Pb correlated images showed a local structure of body-center-like 2a0×2a0×2a0 superlattice, proving a rigid three-dimensional network structural model combining the two kinds of rhombohedrons. The Pb atoms in the networks are positionally stable, while the other Pb atoms are fluctuating. This superstructure and the fluctuating Pb and Nb atoms are believed to play an important role in the relaxor behavior of PMN at the atomic level.

Original languageEnglish
Article number140103
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume89
Issue number14
DOIs
Publication statusPublished - 2014 Apr 29

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Acute and obtuse rhombohedrons in the local structures of relaxor ferroelectric Pb(Mg 1/3 Nb 2/3)O 3'. Together they form a unique fingerprint.

Cite this