Crystal Structural Analyses of Ferrielectric Tetragonal (Bi 1/2 Na 1/2 )TiO 3 –7%BaTiO 3 Powders and Single Crystals

We have investigated the crystal structure of (Bi 1/2 Na 1/2 )TiO 3 –7%BaTiO 3 (BNT–7%BT) by high-resolution neutron powder diffraction (NPD) and high-energy synchrotron radiation X-ray diffraction (SR-XRD) analyses. The NPD study revealed that the BNT–7%BT crystals have a single-phase tetragonal st...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2013-09, Vol.52 (9S1), p.9
Main Authors: Kitanaka, Yuuki, Ogino, Motohiro, Hirano, Kiyotaka, Noguchi, Yuji, Miyayama, Masaru, Kagawa, Yutaka, Moriyoshi, Chikako, Kuroiwa, Yoshihiro, Torii, Shuki, Kamiyama, Takeshi
Format: Article
Language:English
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Summary:We have investigated the crystal structure of (Bi 1/2 Na 1/2 )TiO 3 –7%BaTiO 3 (BNT–7%BT) by high-resolution neutron powder diffraction (NPD) and high-energy synchrotron radiation X-ray diffraction (SR-XRD) analyses. The NPD study revealed that the BNT–7%BT crystals have a single-phase tetragonal structure with P 4 b m symmetry. The crystal structure refined by the Rietveld method was found to be similar to the ferrielectric P 4 b m phase reported for BNT at a high temperature of 673 K. The SR-XRD analyses for single crystals of BNT–7%BT demonstrated that the P 4 b m phase remains as a stable phase in the crystals even after a high electric field is applied for poling, which is different from the structural analysis of ceramics by Ma et al. [Phys. Rev. Lett. 109 (2012) 107602].
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.52.09KD01